So I started playing with the 6mm that was included. Worked well at first.
Was getting some nice test cuts with it so decided to give it ago milling out my case.



Working well for a good 45 mins. I had the feed rate at 200% as my stock settings was making quite a fine chip.
Having it at 200% made a much nicer chip that flew straight off.

It got to about 2/3s the way down the 15mm bit of aluminium and the sound frequency changed.
Went to check it out and I went to pause it but suddenly the bit started to get hot so the chips welded onto the bit.

Doh

Obviously can't go that fast when the ali has warmed up and you are doing 2mm cuts.

Was only air cooling though. I found water kept clogging up the chips and well I don't have any proper coolant system or liquid...