What synths have you made, BTW? I helped a friend make a Transcendent 2000 in the late 1970s, and I now have one of them myself, but in pieces waiting to be rebuilt with new J-wire switches for the keyboard, as the original ones were very temperamental. Also some op amp replacement to reduce noise. It's been in pieces a while as I keep saying I'll finish the kit guitars first, but I never do!