I was about to buy a plane with a longer a pillar --- darn it! I guess roll chart makes more sense indeed.

I know them from the Rally Dakar, I think up to recently they used them, I think they are super cool; great shout :)

I'd wanna grab a friend w/ a 3D printer to make one because I kind of like the flexibility of sellotape at the moment, especially the roll chart mount into the airframe