Why all the heat?
If the design was more efficient you might not need a heatsink.
Something obvious. I saw some poor soul trying to solder a hole in his car radiator.
Someone said he must get more heat into it to solder properly. (they were correct.
1. Poor soul had not drained the water.
2. He started the car to make it warmer after above advice.
He was never nice to me, so I just enjoyed observing the chaos:withstupi
Super X3. 3600rpm. Sheridan 6"x24" Lathe + more. Three ways to fix things: The right way, the other way, and maybe your way, which is possibly a faster wrong way.