Well I am at it again, looks like I am hooked on the ebike way of life. I
I figured you would get to shifting electrics and love 'em.
Once you have rode many different gas powered bikes, their simple eloquence and simplicity as an e-shifter bicycle is hard not to love.
Just a note about the SBP kit's engine mount using the BB...
You made a cool fancy new plate set (well done) but is that ideal for your frame?
Though they are fine on most bikes, they always seem to be a pain in the butt getting the motor in place and spaced right, and the BB parts don't always have enough threads to fit it in and the BB to be on tight.
You can fashion in a motor mount direct to the frame anywhere you want and leave the BB out of it.
A piece of L metal and a couple of muffler clamps and you're set.