The wire spool holder in the IMIg250P is designed for a 30-44 l/b roll. Though the inside diameter of the 10-12 l/b roll is the same it will not fit properly due to the difference in width. I fashioned this adaptor out of some PVC pipe to fit behind the roll and fit over the tension pin and lock into the notch on the roll, holding the proper tension on the wire roll and alignment with the wire feeder. It’s pretty crude, but doesn’t show, I painted this one red so it shows up, and your partner (or you) won’t try to install the large roll and wonder why it won’t fit.
This was designed for the 250 but should work for the 205 and possibly other brands.
Here is a link to plans and photos so you can make your own.
http://www.everlastalaska.com/index....-Spool-Adaptor