Hi Neil
Tried to send fax earlier but could not get thru, was needing to know how the "typical " connection on the drive gear on your universal re-drive is set up. Is it a taper connection like a Rotax, or a flange mount like a automobile crankshaft or are both avialable. My present engine is a snowmobile model with the large tapered shaft on the output. My next engine could be either with taper or automobile style flange(this is used on marine and off road models where a short stub shaft flange is bolted onto the crankshaft, this allows for the installation of some kind of flywheel if needed. The snowmobile is by far the most available and least expensive on the used/salvage market.
Tony