Another method, that I have used many times, is to rivet a piece of 1/8" flat bar to the outside of the area that Dan is modifying. The flat bar goes in the location where the mounting hole to the cylinder is. It is about a couple of inches long. This is a simple modification, solves the cooling problem, and strengthens the baffle at the attach point.
Tom Martin RV1 pilot 4.6hours!
CPL & IFR rated
EVO F1 Rocket 1000 hours,
2010 SARL Rocket 100 race, average
speed of 238.6 knots/274.6mph
RV4, RV7, RV10, two HRIIs and five F1 Rockets
RV14 Tail dragger
St.Thomas, Ontario Canada, CYQS