Somebody must be able to use this:

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=10424&item=2487201012&rd=1

Adam

Would probably end up with a 4" prop

looks light though, doesnt it. I wonder what the ratio would be. and how much matching hubs and brakes would cost! probably cheaper to cut and shut sierra half shafts on.