Help: A Beloved RG2027X With Chewed-Up Knife Edges - Jemsite
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post #1 of 12 (permalink) Old 05-06-2019, 04:43 PM Thread Starter
 
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Help: A Beloved RG2027X With Chewed-Up Knife Edges

I've got an RG2027X that I love to death. She's a rare bird--a fantastic playing and sounding 7-string.

However, the knife edges have taken a real beating over the years. Both knives are dented pretty badly after years of string pull and abuse, and it's a real chore to keep the Double Edge in tune now. I also can't intonate the low B anymore. The saddle has been moved back as far as physically possible, and the string is still sharp. I suspect it's because the knife edges are so dented, the whole tremolo is now sitting too far forward (toward the headstock).

I've read Rich's "Sharpening Knife Edges" tech article, but I'm not sure if that's appropriate in my situation. If my suspicion about the dented knives causing my low B intonation issue is correct, filing out those dent's won't help that particular problem.

What are my options here? I used to love playing this guitar, but because of the tuning and intonation issues, it now just sits unplayed.

Blocking the trem would solve the tuning problems, but not the intonation problem.
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Last edited by webmaestro; 05-06-2019 at 04:50 PM.
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post #2 of 12 (permalink) Old 05-06-2019, 04:50 PM
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Re: Help: A Beloved RG2027X With Chewed-Up Knife Edges

I'd want to see close ups of the edges.
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post #3 of 12 (permalink) Old 05-06-2019, 05:04 PM Thread Starter
 
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Re: Help: A Beloved RG2027X With Chewed-Up Knife Edges

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I'd want to see close ups of the edges.
Will do. Might be a couple weeks before I get to it, but I'll post some closeups here asap.
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post #4 of 12 (permalink) Old 05-06-2019, 07:06 PM Thread Starter
 
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Re: Help: A Beloved RG2027X With Chewed-Up Knife Edges

Okay, time was on my side today. Here's the knife edge pron...
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File Type: jpg bass_1.jpg (425.4 KB, 17 views)
File Type: jpg bass_3.jpg (515.2 KB, 16 views)
File Type: jpg bass_4.jpg (348.0 KB, 16 views)
File Type: jpg treble_1.jpg (397.7 KB, 17 views)
File Type: jpg treble_2.jpg (481.4 KB, 15 views)

Last edited by webmaestro; 05-06-2019 at 07:32 PM.
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post #5 of 12 (permalink) Old 05-06-2019, 08:16 PM
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Re: Help: A Beloved RG2027X With Chewed-Up Knife Edges

That's about as bad as I've ever seen. Can't hurt trying to file them but you may have to swap all the piezo over to a different baseplate.
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post #6 of 12 (permalink) Old 05-06-2019, 09:55 PM Thread Starter
 
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Re: Help: A Beloved RG2027X With Chewed-Up Knife Edges

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That's about as bad as I've ever seen. Can't hurt trying to file them but you may have to swap all the piezo over to a different baseplate.
I do have an LPE 7 here that's in mint condition, but it's one of the old black models, not cosmo.

I'll keep trying to locate a cosmo baseplate, but I'm pretty sure I'll have to just use this black one and live with the mismatched hardware. Not preferable, but I'm more concerned with making this guitar playable again.
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post #7 of 12 (permalink) Old 05-07-2019, 02:55 AM
 
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Re: Help: A Beloved RG2027X With Chewed-Up Knife Edges

Changing neck to body angle by shim, will ask for higher bridge and bring back range for intonating low B.
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post #8 of 12 (permalink) Old 05-07-2019, 10:22 AM Thread Starter
 
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Re: Help: A Beloved RG2027X With Chewed-Up Knife Edges

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Changing neck to body angle by shim, will ask for higher bridge and bring back range for intonating low B.
Interesting. I didn't think shimming a neck added much, if any, string length. But, I'm willing to give it a try since it's a pretty easy thing to do.

Back to Rich's suggestion about swapping just the baseplate...

I figured this would be somewhat complicated, but straightforward enough that I could pull it off with my moderate skills.

Now, I'm not so sure.

I spent about an hour last night trying to get a good look at how the Double Edge is put together (without actually dismantling it). Hard to do since the piezo wire is short enough that you can't really get the trem out of the body very far without unsoldering it from the circuit board, which I don't want to do yet. Also, you can't get a clear view of what Ibanez has done with the 7 piezo saddle wires on the trem itself because they hold everything secure by wrapping black plastic around the sustain block (with all the wires underneath).

Regardless, I was able to see enough to know that I may be in over my head.

Man, those piezo wires coming off the saddles are so thin and delicate, and Ibanez has weaved each one through the back of the baseplate. Then, there's the stuff hiding under that black tape--which I won't know unless I unsolder the main piezo lead from the circuit board, pull the trem, and cut off the tape.

Just thinking about it makes me sweat.

Not counting myself out just yet, but I definitely need to think about whether I'm ready to tackle this. Once I do, there's no turning back.

Last edited by webmaestro; 05-07-2019 at 10:35 AM.
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post #9 of 12 (permalink) Old 05-07-2019, 10:37 AM
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Re: Help: A Beloved RG2027X With Chewed-Up Knife Edges

I never said it was going to be easy

All the wires go to one buss line IIRC.

Remember shotgunn mods, used to do all the piezo work on these, converted edge pro's etc. If you're over your head I'd reach out to him to do the job.
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post #10 of 12 (permalink) Old 05-07-2019, 10:47 AM
 
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Re: Help: A Beloved RG2027X With Chewed-Up Knife Edges

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Back to Rich's suggestion about swapping just the baseplate...

....

Not counting myself out just yet, but I definitely need to think about whether I'm ready to tackle this. Once I do, there's no turning back.
Can you change only blades taken from other baseplate? They should go out by using some good pliers.

Last edited by peromucho7; 05-07-2019 at 10:57 AM.
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post #11 of 12 (permalink) Old 05-07-2019, 10:54 AM
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Re: Help: A Beloved RG2027X With Chewed-Up Knife Edges

You can usually work the curved one out, good luck with the flat one.
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post #12 of 12 (permalink) Old 05-07-2019, 11:02 AM Thread Starter
 
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Re: Help: A Beloved RG2027X With Chewed-Up Knife Edges

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I never said it was going to be easy

All the wires go to one buss line IIRC.

Remember shotgunn mods, used to do all the piezo work on these, converted edge pro's etc. If you're over your head I'd reach out to him to do the job.
Funny you mention Shotgunn. He actually did a piezo mod on an Edge Pro 7 for me about 6 years ago... and I was able to find this photo from that mod. Probably a good indication of what I'll find under that black tape...



That actually doesn't look too bad. I'm a little less scared now, and might try to tackle this over the weekend.

I should be okay as long as I take a boatload of photos while I'm disassembling and desoldering the Double Edge, and as long as my other LPE baseplate doesn't require any kind of metal work (e.g. drilling holes). Best I can tell, the individual piezo wires are just threaded through the back spaces, where the fine tuners are. Can't see any extra holes or anything, but I won't know for sure until I dive in and start taking things apart.

Last edited by webmaestro; 05-07-2019 at 02:49 PM.
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