if you have the Centa coupler, you just need to buy or modify the rotor and cut the bell housing, or so I gather. That would be the greater cost for me, given that I'd have to have a shop pull the motor and do that work. .
Correct - you don't need to fit the full PB modification anymore. In fact I think PB doesn't sell them anymore for third party installation - he will only fit his Centa upgrade himself.
If you go the 'rotor modification' route then you do not need to 'break' the crankshaft to Centa connection which is the point where a few further issues have arisen where a complete PB kit has been installed.
