Good to hear that yours is working. I've not tried a single flute cutter yet, perhaps I should. I did the bearing mounts with a 2 flute 5mm cutter using 1mm depth at 200mm/min. Took a while to cut through the 1" aluminium, however it didn't require cutting fluid which left me free to leave it running whilst I made other bits :)

I've finally bought the ER16 collet chuck and set of collets for my big brushless motor. I thought that it'd compliment a kress spindle nicely when I can afford one of those since this motor will do up to 6000rpm, and the kress from 5000 to 25000rpm.

[Meant to post this hours ago - helps if I remember to press 'post' after typing!]