Re: Jackson Licensed Floyd replacement
I don't think what you say about the JT580 is entirely correct, at least about the low pro version.
I have a DK2M that I just bought, and the trem doesn't suck! It's not in the same league as the OFR and the Schaller, and some of the Ibanez models, but it stays in tune, and after replacing the wobbly arm with a Schaller one I had, I've had no real problems.
I think the confusion comes with Jackson naming their trems the JT580 LP, when there are two different versions of this unit. The original one was a pretty low quality unit, one of those TRS type, but since about 2006 (I think), there's been an upgrade, and the base plate is made of steel (God knows what they used to make them out of!).
You can usual tell, especially if your Jackson came with "Duncan Designed" pickups, instead of the "name" Duncans (JB and Jazz on my guitar).
The thing is there are a lot of people moaning about this Jackson trem, and wanting to upgrade as soon as they get one of these guitars, when it isn't a real necessity, at least not straight away. The best thing to do is try it first, before casting it aside.
Apart from the trem arm problem which is easily fixed, I've found it stays in tune pretty well, and I can even get "flutter" from it (which is only supposed to be possible on the top quality models!).
I may upgrade the block for a brass one at some stage. It's certainly a lot cheaper than shelling out for a OFR. I always tinker with my guitars anyway, and if I can upgrade the cheap parts as I go along, I prefer to do this, as I don't have the thousands it would cost to by an expensive USA made model.
You pay your money and take your choice, but from what I've seen dropping an OFR in the recessed cavity of the DK2, doesn't look right somehow. It is possible, as I've seen pictures, but I'm not sure I'd do it , as it's routed for a low pro trem, and there seems to be a lot of space around it. It just looks "wrong" to me, and I'm fussy about how things look on my guitars!