I have finally made some forward progress!!

I swapped this chassis with another forum member about 6 weeks ago and after that time spent doing prep work I have finally made some forward progress replacing some box section and welding in the back panel...

It's not that clear from your photo but I would check that "fu2" is in the right place, it seems out board. If you are racing it I do'nt know if it matters but for road going you'll have castoring problems.