Just behind the axle I slid in some bar stock that was tapped.  I forgot about it.  Adjustable laser mount!

There is a nice spot in the front there for a hunk of spinning iron for imparting roll into the body.  I am not sure how effective using roll to generate yaw would be, but pitch the hoverboard takes care of for us.  Pipe dream.  No really.  I think a BLDC motor with a bit of pipe around it would make a passable reaction wheel for this application.  Alternately for imparting yaw, a flywheel from a model steam engine also driven by a BLDC would probably make a really nice reaction wheel.  If accidentally launched into orbit, we would be able to orient ourselves rather effectively, until saturation or our batteries out gassing does us in.

The last two entries shall be stricken from the record.  Moving on.

I still have to terminate the new wiring to the old connectors for lights.  I don't know if both controller boards have separate 12 volt buck converters, but I'm not taking any chances.  Each side for lighting is staying independent and +12 volts is not being shared.

The tire has a slow leak.  Sad, but I'm satisfied my o-ring area is stable, so I'm just waiting till the tire can spin on it's own, and Slime (tm) ing it.

The battery compartment pre-mylar.

Tail lights will need some thin foam or a few layers of mylar for diffusion.   

Inside of the poly carbonate needs some a suitable image printed and stuck in there, or a little creative painting.  The poly carbonate does not respond well to being cleaned after painting, so that little bit will be waiting until it is assured.  I have some ideas about painting a mist of chrome through fish-nets if no suitable image is produced in time by my son...

The headlight needs a mount, and I need to build the front foot area lighting and such yet.  There are two indicator lights from the hoverboard I want to save: Low battery and power.  I'll be shining them through the front foot area I think.  I would prefer the side rails if that is visible to the rider.  It probably is not.