Some time ago I talked about the dread “butt wiggle”
When I used wide 4″ fletches, and it was suggested that the big butt made for big wiggles. The rule I adopted was “The bigger the butt, the bigger the wiggle” Changed to low profile, 3″ fletches, and the but wiggle only shows up when it is gusty (no steady winds here). Mind you my short arrows are 23% foc.
Working on a bow, as we speak. Actually I steamed the upper limb last night, and now watching it as it sets on the rack. Steam the other limb tonight. Then I have to watch it for another 24 hours, before I can fiberglass. Lot of work making bows.