My local EAA tech councilor crawled over my plane yesterday, a bit of a pre-instpection review. The only thing he took exception with was the rigid mounting of the seatbelt anchors. He felt they should be able to swivel a little to insure that under load the belt is aligned with the anchor and evenly loaded. He suggested that I replace the AN-4A / Ny-locs with AN-4 and castle nuts just over finger tight. His reasoning seems sound and he is my DAR so I planning to make the change, thought comments or concerns?