MM is way too hot! Why?

[BrianG]

If you decide to do this, I would take the ESC out of the case before you start drilling.

Personally, this just lets in more dirt/dust and shouldn't be needed, especially if using a UBEC. And if running the MM that hard where the bottom layer is overheating, maybe the MM isn't the right ESC to use. IMO, extending the pins that connect both PCBs (to create a larger gap) and then adding a heatspreader would be better.

[Happywing]

Some extra dirt/dust does get in there, but It hasn't caused any trouble so far. The temp difference is very noticeable. If you have the fan blowing through the holes and across the top of the heatsink, it stays nice and cool.

[miniGranis]

Originally Posted by Happywing

Some extra dirt/dust does get in there, but It hasn't caused any trouble so far. The temp difference is very noticeable. If you have the fan blowing through the holes and across the top of the heatsink, it stays nice and cool.

Thanks for sharing the pic.