I know one difference between old and new roms on the game is that they capped off the value on the left ramp. Before, the left ramp value would keep going up and possibly cap off at 5 mil. Newest rom makes left ramp value cap off at 2.5 mil. Not sure if way out of control shot had a cap also on early roms. Lastest rom came after Pinball Expo 91 when everyone started just shooting left ramp for points and extra ball during the tournament. Got to play Rick Stetta's winning Party Zone from Expo 91 earlier this year which is still in great shape.