Your work is absolutely great!
I think I got inspired by some of your threads on RC10Talk to start some measuring and modelling of my old Dogfighter.
It is not something likely to be fully completed. My concern has always been the rarity of the drive train parts.
Thus my car has not run since the 90's. Maybe a modified altered clone is somewhere in my future also.
Also: Please tell if You are willing to work for peanuts and make many spare metal parts :-)
Not sure if it helps, but I have made some 834B chain sprockets.
The idea was to make sprockets for both original chain and the larger type Kyosho Optima chain.
The 13T sprockets for standard chain seems fine.
The 10T sprockets for Optima chain fits, but the car does not accept the wider chain without modifying.
I use OpenSCAD and print at Sculpteo.
A link:
Experimental chain sprockets 834B std/ot