Quote Originally Posted by Chris J View Post
Jonathan, what machine / cutter did you use to cut the 5mm sheet please ?

Chris
See here:

http://www.mycncuk.com/forums/showth...ooling-system/

The outer profile and 2mm wide slot were on my CNC router and the 0.5mm slots were cut with a slitting saw on the milling machine. To be honest I can't remember which cutters I used. Probably these:

http://www.ebay.co.uk/itm/5x-6mm-Car...item20b95dbb6d

The same seller has plenty of smaller ones too...