EBMM Petrucci question

Anybody out there own one of these? I have a 7 string with the piezo pickup and find it to be an absoutely amazing guitar. If you've never played one before, you have to give one a go just to experience the feel of the neck.

My only problem with it is the tuning! It has a Music Man trem which is really cool BUT there is no top lock and the tuning does not hold if you do any dives. I recently recorded with it in the studio and had to retune after almost every take. The strings I'm using are Super Slinky 10's (a little heavier than i'm used to) but they should not be an issue (the trem is set up just right, as is the action and intonation). I broke them in for a few days before recording.

Any idea what the problem could be?

Pm silentmusic for all petrucci guitar qestions, he's very helpful in that field. What did you pay for that sucker?

i was experiencing the same thing when dive bombing with my non petrucci guitar. i later figured out the strings were overlapping each other on the tuning pegs.