I'm a little frustrated with progress on this, especially since I started asking questions back
then.

As much as I like making stuff I don't think I will do another conversion myself for some time.
So I thought I would show you what I have so far anyway. I started with some CF angle and glued stuck them together. This will form the chassis and battery tray in one.
As a result I have had to make more mods to make it all sweet (more of which to come).
Most of what is in those pics is just placed together with no screws (including where the chassis joins to the front assembly). I have shown a castle 1520 in there but I will be using a 1524 1y when I get it going. I will also fit a length of aluminium between the 2 sides as a kind of a backbone. Obviously the steering still needs to be sorted out, I have some parts on order and will need to make a top plate to mount the servo.
Final pics next year