Hi folks,
Does anyone have the specs to hand of the rear axle splines of both GT(S) and PX200?

I've managed to pick up what I hope are the majority of pieces needed to do the GTS wheel conversion on a classic Vespa. On the front I'm hoping to just use ET forks with the GT(S) wheel/rim/hub bolted on. For the rear things seem to be a touch more complimicated? I am wondering if there is a chance that the hub/axle splines on the two scoots are the same (doubt it otherwise the various conversions I've seen would be alot simpler??) but you never know I spose? It seems that most conversions use a standard PX rear hub with a mounting plate attached 'pon which the GT(S) wheel then gets bolted as well as fixings on the other side for the rotor itself. But it would be ever so much simpler if one could use the GT(S) hub itself somehow attached to the PX axle? I've seen a Crimaz setup that seems to have a bespoke (is it the GT(S) item itself, but modified?) rear hub but no idea what the actual details are, aside from the rather solid price tag...