As far as titanium turnbuckles go I've just ordered some from 3racing, but I'm sure there are plenty of other possibilities. I got 38mm (spot on) and 48mm (ideally should be 46mm, but they don't do any).
The shock shafts are a slightly trickier problem. However, the Kyosho RB-Ultima Type-R Evolution uses titanium nitride shock shafts that are almost identical in length to those used by the TRF501X:
Front
Kyosho = 37mm (#W6003)
Tamiya = 36.5mm
Rear
Kyosho = 46mm (#W6004)
Tamiya = 45.4mm
I don't know the diameter of the Kyosho shafts for certain, but the various spacers used in the dampers do have internal diameters of 3mm (the manual is available on the Kyosho website).
Plus, I'm assuming Kyosho quote the length using the same definition as Tamiya, i.e. from the lower edge of the lower circlip (used to secure the piston) to the end of the shaft (including the thread). Anyone know any different?
Does this sound like a reasonable solution or have I missed something obvious to everyone, but me?!
