I have learned that the touchscreen seems to work best with most games by activating mouse button 1 on release instead of when you first touch the screen.
I'm just about done working on software for this project. I installed Bejeweled Twist and Masque's IGT Little green men slots. I found a version of MAME that was compiled with no nag screens and replaced my old MAME. I'm running Megatouch 2,3,4,5 and Touchmaster 2000, 3000, 4000, 5000, 7000 and 8000. Some shooting games T2:judgement day, Point Blank, Point Blank2, Clay pigeon, Operation Wolf, Space Gun, Turkey Hunting and a couple more I can't remember off the top of my head. The turkey hunting game has a little calibration problem, but it's close enough. On my original .143 version of MAME, the megatouch solitaire games would mess up when you cleared a column. My hacked .146 version doesn't do this so all those bar games are loading and running perfectly as far as I can tell.
The final jukebox is DWjukebox with a really nice skin called woodcabbox. I especially like this skin because it has the radio and exit buttons: