RE: 8' Otter scratch build
I did the 6'. fly's decently enough, but its kind of a pile of **** lol. its not a very scale cross section for the fuse and some of the material choices aren't really adequite, like balsa spars.. if i was scratch building from plans i would add a ton of things, like doors, and formers, and personal taste i would probably fully sheet it and paint it. the tail came out with a really nice shape though. should have tons of room under the cowl. i made a custom functional exhaust pipe on one side.
good luck with her