Dear Richard,
I’m sorry to say, but there will be big problems to find/create the missing parts.
The standard ATS bracket is made for bottom bracket shell diameters of 33.6 - 34.5mm, according to their website.
The Strida bottom bracket shell has a diameter of ~ 52 mm, you will need an excentric bottom bracket mechanism similar to that you have now in your Strida.
Similar, not equal, the new one has to be more broad!
So I think it’s not possible to modify the existing bracket mechanism…
The 80 teeth beltwheel you will need is not available as a spare part, as far I know.
(I will try to verify that and ask Ming about it.)
Btw, Mr. Schlumpf had obtained these 80 teeth beltwheels from Ming Cycle directly, he did not make them himself.
Mr. Schlumpf also told me that these beltwheels were not manufactured precisely; therefore he had to chisel them out ~ 0,4 mm.
The belt should be no problem.
Just like the Schlumpf drive, here is an interesting video about the process:
http://www.youtube.com/watch?v=0teCnQJskgQ
Please note: The video is showing a chamfering procedure, done by a hand milling tool.
This procedure is needed for all bikes, except the Strida (due to the excentric bottom bracket).
Best regards,
BSA