I'm looking for a Egret 2/3 or an Atomiswave SD Cabinet in good condition. I have cash waiting. 

I have recently installed a PC with Mame in my Golden Tee cab. The Cab has a Hanterex Polostar tri-sync monitor. I have two issues with the monitor. In 31kHz (640x480@60hz) I get interference on black backgrounds. Its visible in low light and you can see diagonal lines moving across the screen and speckles. I installed a new shorter VGA cable to ensure it was not near any power cables and it made no difference. The second issue is that if I use "switchres" 15khz games such as R-Type are way off the the right even with the pot on the remote board turned all the way I can't centre the picture? The manual talks about a low impedance jumper that must be in place when using VGA, but I'm not sure where. Any help would be appreciated.