Yes.
It's been almost 4 years since I posted to this thread.
But the M64 has tagged along through all the moving, and sits in different corners or closets since there's no room for it in the bedroom that's combined office, crafting, games, drums, guitars, and electronic vomit that's in various states of repair/disrepair.
And the M64 remains in a various state of disrepair. I recall back in 2013 threading tape and it wasn't working right. I have a video somewhere of the problem...I'll have to watch it to refresh my memory, but I think there was a loop that would keep developing on the takeup side. Somehow I got ahold of Dale Manquen (who passed away not too long ago
...RIP Dale), and he watched the video and directed me to check a couple electrolytic caps on the logic board that control the timing of takeup tensions and such. When I pulled the logic board I could see for one of the caps there were two caps piggy-backed...the cap is supposed to be one 250uF and these two caps were 50uF each (in parallel so 100uF total...not enough), so I ordered replacements for both of the lytics and then life got nutty. I finally put them in last eve.
I still really like this machine.
The logic board is easy to pull out...there are three screws to remove on the back of the chassis and then the board unplugs and out it comes.
You can see the two orange piggy-backed caps above the relays there...
When I removed them I could see somebody tested the caps before putting them in and wrote the actual capacitance measured at the time on them, but that only totals 135uF...still not enough...not sure what the thinking was there.
Anyway, new caps are in...I need to find a 1/4" NAB takeup reel and a reel of 1/4" tape in all the hodge-lodge here to try it out now and see if it's any better.