I just picked up a Lectronamo, and considering that early SS games from Bally/Gottlieb are fairly common, I didn't think much of it at the time.
But after I started doing some research for reference photos/videos, parts availability, it seemed like there are very few of these floating around. Not even 20 recorded FS listings or verified owners.
Then I started looking at other MPU-100 games, and it seems that most of those titles are also somewhat uncommon.
Just how rare are MPU-100 games? It looks like finding game-specific replacement parts is going to be extremely difficult...