Just a note*** many of the router bits are .244 but some are .247 to .252 (the cheap ones) you may want to check your routers bits.
And I'm sure you know .250 is 1/4" but again many mill them smaller so they can side in easy.
And you're right about the heatsinks but the rubber will help. it's not that hot or to say it should never get that hot.
Bj
