Do the ground mods, repin connectors, rebuildthe power supply and put new bridges in the bottom board is a good start. After that it's troubleshooting whatever the crappy grounds killed as a general rule. My Cleopatra has been running fine for six years now. I rebuilt the power supply and put in a ni-wumph mpu and rottendog driver. It had no mpu and the driver was so shot it was cheaper to replace.