How about this comparison of the #tsdz2 and #bbs02 @Andres4NY ? Is the open source firmware able to solve the throttle issue? 52V battery / more power? The zigo is a trike stroller convertible bike with a 3sp sturmey archer hub and I'm thinking of making it a manually shifted double tsdz2 (no objection to front derailer but don't care if it won't fit, I just need a chain tensioner...)
https://youtu.be/T7ve958hJXE