Hi John,
  In your "Quantum Restore part 13" video you mentioned your Qbert high score save didn't work.  Here is a link to a KLOV thread with an easy high score save mod that doesn't use dallas NV ram.
http://forums.arcade-museum.com/showthread.php?t=348197  
Towards the end of the thread you will find my post.

-Sean

Hi guys,
  This is my first post.  I just got a few John's Arcade branded kits from iankellogg.com  They look real nice.

-Sean