I'd actually expet the pump to only draw 12 amps, but as they get older, they start to draw a little more current.

The Cossie and RST pumps are not the same although the Cossie pump will fit. The Cossie pump has a higher flow rating.

The S2 rev limit was slightly lower for some reason.

I think Paul has as much info on RST rev limiters as he will ever need now anyway!