Its only a hat. I dont like regular magic loop, too much backwards and forwards with the needle and cables. Half magic loop I only have to pull the needle & cable through at the end of the round.
Maybe its because on a 20" hat, two 5" needles will tend to stretch it out. I do have some shorter ones, I'll try swapping.
But if your DH can indulge me with a photo of your yarn/gap holding trick, that might help. Thanks Jan.