Bike Friday Tandem with some tech upgrades

I mainly wanted some help on the hills, plus regen for long descents to save the brake pads. Everything bar the battery is from Grin (All-axle motor, Baserunner, Superharness, Display). The battery is an Infinite Battery which I "should" be able to travel with by air as it easily disassembles and the cells can be taken as carry on luggage. I also upgraded to 1x13 drivetrain with wireless derailleur which really pushed some tollerance limits.

The amount of power far exceeds my expectations. Flying up a 20% gradient on a tandem is no mean feat, but this thing does it with ease. The regen however is limited by the max amps of the battery (8A) so I still need to use the brakes at times. We comfortably get 100km on a single charge, but could opt for more or less depending on the level of assistance. All up it's been a very successful project.