Thanks TOC. When I finally get to working on the one I have with a Berry Drive, I will try and remember that.
There’s a 2-80 with a BBT drive (claimed) on Craigslist Fresno, in an antique store.
https://fresno.craigslist.org/tag/d/clovis-bachmann-conversion/6988437327.html
Curmudgeon mcneely said:
Biggest customer created issues was said customers trying to disassemble by removing Phillips head counter sunk stainless screws from underneath. Everything fell apart inside, spacers fell out, required chassis removal and re-fabricating missing spacers to get it back running.
TOC
Were you spying in my workshop??? Those spacers were a bugger. 
Greg, here’s the finished loco:
Later,
K