My 14 year-old son and I built this kit (for him to play) about 2 years ago, and have never been able to get it to stay in tune. We can tune it then lock the nut, but as soon as the (Floyd Rose) tremolo arm is used, the tuning goes way out of whack. Got the bridge float correct, action height correct, truss rod tension correct, tried different string gauges - done everything! and we've even had a guitar tech check it out, all to no avail. I've posted here a few times over the last 18 months hoping that someone might have built the same guitar and done so successfully who could give us some clues, but so far no responses. Thought I'd try the forum again. Any advice would be most appreciated.