High Score Save Kits for Zaxxon now available at:
www.brasington.org/arcade

I just got mine and it is fantastic! Saves top 6 scores & initials without the use of a battery, lets you change game settings through on-screen menu (versus crawling inside and messing with dip switches), and best of all - Let's you set it up for FREE PLAY with full attract mode (no more screen burn-in).

Installation was a breeze - simply remove the Z80 CPU, plug in the daughterboard in it's place, then plug the Z80 into the daughterboard. No rom burning/swapping req'd.