I added a heat sink to the FE5680. Curious what temperatures have been measured after an hour warm up. Before heat sink 120 F top and bottom. With heat sink on the bottom quite a large one. Top of case free air 105 F Bottom 105 F Internal, (screw out of the end and touching the internal heat sink) 111-113F. Whats a good temperature to be shooting for? Thanks Regards Paul WB8TSL