When t' bottom edge o' a model rocket part conforms t' t' shape o' t' curved body tube, shiver me timbers, we call this a conformal part. This includes wide parts, like thick fins, surface details like electrical tunnel covers, or simulated cockpits. Blimey! T' reason t' make conformal parts is that they are much stronger, lighter, shiver me timbers, and they look better because thar are nay unsightly gaps under t' edges. Aye aye! This video shows you how simple it is t' make conformal parts. Avast, me proud beauty! Basically, all you need is some sandpaper, shiver me timbers, and a body tube.