I am actually starting one here next week or so. I will post progress pictures here. When I make the Aluminum prop hub I cut a alternator pulley on it and use a john Deer alternator (really a dynamo) and it works fine.
Are you able to cut the thrust bearing surface on the case? My machine isnt small enough to make those cuts. I wish a "3rd" bearing was easy to make, id just use a thrust bearing up front.