[lincpimp]

I like your "reverse heatsink" shaped adapter idea for the MMM. I would like to see that item mounted to the al chassis, then the MMM flipped over and stuck to that. That way you get the thermal mass of the al chassis to draw the heat off the esc. Same could be done with the motor, just make a half round motor cradle that contacts the can plenty and attaches to the chassis. Not sure a servo really needs to be cooled? Maybe just a mount setup that clamps to the al center section that most good servos have?

While water collling seems cool I see it as being too complex and finnicky. I do like BrianG's heatpipe idea, and they sound pretty easy to make. And no moving parts either.