Last year, I installed my first hardtop and thought I'd document my experience here. Even with a steep learning curve (I'd never done anything like this before) it went pretty well.
This all started with me picking up two Mata Hari's from two different estate sales, about 3 months apart, for $300 each. Neither machine worked - one didn't power on, the other powered on with GI lights lit but would not boot into attract mode. My initial goal was to repair each machine to working condition, sell one, and keep the other for our newly built-out basement gameroom (which already had Eight Ball Deluxe and a Star Trek Pro).