i'm kind of puzzled by most of the responses to this build.
its purpose was to demonstrate the feasibility of the Rohloff/Gates/Bafang triad which to me seems much more desirable than waiting for an overpriced proprietary bosch version if it ever comes
my LBS did the assembly but my understanding is that the alignment was not an issue and required no correction but if i had used a Shimano or SRAM IGH it would have been
https://california-ebike.com/thinking-adding-bafang-mid-drive-belt-drive-bike/
while i'm not attracted to installing a gear shifting sensor right now (it seems pretty easy to just let up on the throttle) i do appreciate the suggestions and information about what's available (which i didn't know).
with regards to doing things right the next time, it's road stability issues...
re: gear shifting sensors
you must indulge me in my substantial ignorance of electronics- i had my LBS assemble this after i procured the parts online.
to quote from the E-Rad link you provided...
"Connects to the dedicated Gear Sensor cable that is included with all e-RAD drive units"
the...
it's pretty quiet to my ears (the noise seems like it's from the motor and not the belt) but i guess it's not like a Bosch or a Curry.
i don't have a gear sensor (i was informed that the E-Rad gear sensor is incompatible with this iteration of the Bafang) but it doesn't seem necessary because...
on flat terrain the transmission seems perhaps superfluous (with the current gear ratio of 2.5) because the 750 watts from the motor can easily power the bike starting in 14th gear from a standing stop to top speed (about 30mph before the assist cuts out).
going uphill the process of shifting...
it works pretty good...
California Ebike BA130 Bafang chain ring adapter
26" 1and1/8 straight steerer Boxxer front suspension
Magura MT-5 quad piston hydraulic disc brakes
KHE Mac26 × 2.30 "Park" 120psi tires
Chris King 36h disc front hub
Chris King 1 and 1/8" headset
Rohloff, 36h threaded...