Thanx Kalle, the coupler is working xllnt (hope I didn't jinx myself admitting that out loud lol), makes quick work changing buckets/ect, getting pretty good at doing quickly too.
No, I kept the 2pos controller, I got the timing just right now. I didn't want to have rely on my counting every time & it's impossible to hear if the furnace is running. I used a dab of red locktite on the union, probably stronger than epoxy.
Something odd though, sometimes while using the tracks, especially turning, the high amp draw on the 2x25 some how causes the 2pos esc to activate, the pins cycle in then out again. Were you using a 2pos esc too? This ever happen to you?