Steve reads these boards. I'd wait a bit, maybe he'll reply. I sort of remember the answer posted previously somewhere on PL was that the g100 and g120 are the same thing except for some feature not relevant for laser show use. I don't fully trust my memory though. Here is an antique web page with links to some info for the g100 and g120:
https://www.laserfx.com/Backstage.La...msPinouts.html