Jem7V not staying in tune when using tremolo
I know that tuning problems are a fairly common problem, but I have one I don't seem to be able to fix...
If I do a dive bomb on the tremolo and then tune it, and then do another dive bomb, it will stay in tune no problem. However, if I then pull up on the trem, the all the strings have gone a little sharp. If I push down on the trem again, they go back to the original tuning. It's like the trem is getting stuck a little in whichever way I move it.
I've seen people write about this problem before, and one common cause seems to be worn bridge posts. However, I've changed mine (twice), to no avail. I've also lubed every moving part I can find, including where the strings pass over the saddles, but still no joy. New strings always behave the same as old, even after stretching.
I've even had a guitar tech do a full trem set on it, but still it behaves the same way.
Anyone have any other ideas? I'm beginning to wonder whether I'll have to swap the whole trem out...