Cossack, you emailed me the link for "Gizmo's" in case you clicked the wrong name, lol. I have a feeling not much will work for half moons on AZ-EZ. I know the pencil eraser won't, and it seems to me, anything you add on the arrow at the nock end is going to relocate the position of the vanes on the shaft, to the rear and you might have interference problems w/ that. you may have to consider a differeent style fletcher for half moons. Gary L on Excal forum is a whizz on those AZ's, maybe pm him there??