The side rails.

This is the AL stock I had of the appropriate dimensions.  I believe this is from some garage wall mount system. 

It is conveniently strong in all the right directions and has a channel for wiring if I play my cards right. 

I started to model some covers to slide into the sides.  Should bring the project together nicely. I may need to populate that space with an LED strip..  

I will probably integrate end-caps for the rails so they don't stab people before I go further with this.  The rail corners were looking rather sharp, this may be ridden around people, and the rear is going to need some sort of consumable bumps for grinding to a stop after lifting your foot from the front.  

I like the idea of them pressing into end of the rail. 

More work required.

This is more or less how it’s going together. The tire being 6 inches further down though.

I’ll be mounting an aluminum plate to protect the rear/battery area and then wrapping the rest of this in poly carbonate. 

I went with an asymmetric layout with the front being shorter for the frame than the rear as the rear need to be 9in long to house the battery

The front only needs to house the electronics and headlight.  I think I may cut a handle in the top/front deck..

The outer dimensions ended up being 29x9in.