Thanks Norm,

Bit of a painful operation, but doable with the right bits and pieces. Makes me think, what was the most important consideration when they built these things? It almost seems like Victa built the engines to fit the base, rather than the other way around. Very strange...must have been an offer they couldn't refuse.

I haven't looked at the bottom ends of these in great depth yet, but I don't suppose it is possible, or at least trouble free enough, to transplant a crank from one of the dead normal size PT to one of these. That might be a better solution?