Hi Ian,
I had the plates laser cut, got 2 sets just in case, and then made up the spindle tubes. I made a reasonably tight interference fit with the tubes in the end of the link plates and once I pressed them in they are certainly very tight, so I don't think I need to do any more to them.
I now need to turn up some spindles and will probably use 4140 steel for those and see about getting them hardened. I don't have any dimensions of the spindles and understand that all 4 are different sizes. Attached is a pdf of the CAD drawing so if anyone has some spindles for the later model TS, rather than the veteran model, and wouldn't mind marking up my drawing where I've got it wrong and for the 4 different sizes, that will be much appreciated.
I'm very happy to make these CAD drawings available if anyone would find them useful.
Cheers
Marcus