1. No, if your game is leveled correctly and your spinner rests straight up and down when not in use, shots should be smooth, even during long games. I have original coils. Mine is from the 5th run and ring shots are no problem even during league nights or 45-50 min games.

2. Are you running 10.0 roms?

3. Right when you boot up, should say the rom revision or go into adjustments like Steve says. Or open up the head and look at the stickers on your rom chips. That will tell you in a hurry. If your running a really old rom set. You are going to need to update the firmware chip as well for the 10.0 roms.

distored sound is from 2 different sources. one is non updated firmware. Other is from degrading sound files on your sound chips from the florescent tube having UV light work it's way through paper stickers. Block the back of the tube or put electrical tape over the roms to stop that from happening.

$15 and $10 each? WTF. John Wart used to only charge $4 each.