hi folks, just an update. the arc welder broke, which is really hard to do given that technically speaking there's no moving parts, so i'm continuing the research for parts instead.
one thing i found incredibly hard to find was this: http://www.everything-ev.com/index.p...ex&cPath=65_79
they have transmission adaptors for clutch plates, and it's a modular design using "taper lock bushes" which i didn't know about and yet makes an awful lot of sense: apparently taper lock bushes are becoming an industry standard, which is great.
basically it means that rather than having to create one specialist machined part per vehicle per motor, they can make a single adaptor and then select the bushing in the middle to fit any motor. as i am using quite an unusual size (7/8in) shaft on the ME0708 they're having to make some enquiries to see if they can get one: they have 22mm and 24mm as well as 1.125in but 7/8in works out at 22.23mm or so. all good fun...
but basically, rather than spend a fortune on getting a transmission adaptor custom-made, these look instead like being a damn good option, and i'm surprised it took me so long to find them. i dunno - perhaps everyone on here knows about them already.