You are correct. Unless GRPro suddenly started making what appears to be an exact duplicate of an RCGF 100cc bottom induction twin. The picture in the first post is GR, but not the pic in post 4.

Send a pm to Aussiesteve. He'll put you in touch with Driesbabe in South Africa. Good exchange rates and a real good person to deal with. I have a previous version of the 100cc RCGF and after upgrading it with improvements now standard in the current version it will toe the line with pretty much any 100cc twin out there.