"Then you have to fix it to the stock so it feeds correctly."
Yes if you're talking about a staggerfeed mag. Shouldn't have to with the centerfeeds as they're already fixed in the stock and not attached to the action. You should just be able to cut out a notch in the front for the bullets to stick through. I haven't tried this yet but plan to and wonder if the rounds would slide forward during recoil too far and make the bullet catch under the feed ramp.

"The left port load is plenty fast enough as this is not a "running jackrabbit rifle"."

True, which is why I have thought of just running mine as a single shot instead of all the fuss with the magazine. Haven't made up my mind yet.

By the way, Merry Christmas everybody!