The Sea Fury is a more recent build with the 61SP in it. Just enough power but good scale flight.

It took 3 goes at the baffle to get the right shape and get it close enough, although I could still probably improve it.
What I ended up doing was carving a piece of foam I had shoved into the cowl until it was the shape I wanted, then glassed it, dissolved the foam, then bonded the baffle to the inside of the cowl. Apart from the carving time it was pretty quick and easy.

Air doesn't like going around corners so you have to think of it as forcing the air over the fins, cause it won't do it on its own.