Drilled the stuck bolt end with a .6mm drill and it just fell out inside the frame. Just a small chunk that can stay there for all I care.
Battery holder now mounted with a longer and newer pair of bolts.
I decided against using their long battery lead extension and instead soldered the leads to the terminals after threading them through the
cable grommets in the base of the mount. Shorter leads = less resistance = less cabling to worry about.
Leads stripped ready for solder:
Soldered and insulated:
You know that moment before you fire it up where you hope it works but experience tells you to expect the worst? I had it for a split second but
thankfully everything powered-up.
I lashed the cables with gaffer tape and took it for spin.
At this early stage it seems comparable to the hub system. It's slower to accelerate but it's more agile.
The BB is smooth, in fact the entire drivetrain is smooth.
With power off, pedalling is far easier than the hub system.
Weight: 17.86Kg = 39lbs 6 oz
The hub system was 17.92 but that was with a 350g penalty with heavier Schwalbe Marathon front tyre.
So the Bafang 250w is heavier by 290g.
I was hoping for a lighter result since the front derailleur / lever and triple chain ring are gone.
I was also hoping for more pedal assistance to match what I'm used to on the hub system.
Next stop, off to the Bafang forums to work out how to adjust the response curve.