I remember that however if I recall he also had fiber washers separating the module from direct surface contact with the case. That’s the key. The heat sink would be a heat migrator from whatever it is attached to. I’m his case he mounted the heat sink to a resin case module which ain’t going to work. There has to be a mathematical thermal transfer. If anything the ambient/radiating heat is going to heat aluminum heat sink to a higher temp than the resin case in the module. Personally I don’t think the sink did anything, it’s all in keeping the flat back surface of the module off that engine case and in his case, those fiber washers did that
