OK, so I got a working clock circuit, interesting it wouldn't go when
I powered it off a 5v cell phone charger, but worked great off a ram
chip...needed to share the ground.

So, anyway, here's an idea: shorting the sound chips on a 707 to
those on a 727 -- not when they're on the same machine per the "70727"
mod, but with two fully intact machines running side by side. I'm
guessing they would need to share ground, so I was thinking of running
both of them in parallel off a single 500mA universal that I have.
I'm afraid that it would fry both of them, though I really don't see
why, can any of you electronics gurus think why this would be dangerous

After all, you can short the main chips to the ride/crash chips
without issue, would this be any different Also, just thought of
this: what if I just tried it out by running them off the same power
strip--they would share ground that way too, right