I made the one for my Portamig with a 50mm hole through the middle. The spigot is 10mm. The hole to accept the spigot on the machine spindle is 12mm. The centre of the spigot (and the corresponding hole for the machine spigot) is at a radius of 45mm. I made mine 20mm thick (just sets the reel out a bit to improve the line-up of the wire). I also use a spacer on the outside made from a short length of drain pipe. I hope that helps.
Thanks guys, its going ok so far with the machine, very much still finding my feet with it..
Next thing to solve is the gas issue; im working on a borrowed C02 bottle at the moment and with me needing to buy my own im torn between the relatively cheap C02 setup or go Argo...
Depends on what you are welding how critical it is how much gas u will be using blah blah blah, CO2 works for me because it is cheap and I do not use as much as I would like to