I was just thinking about the intake problem with a 91, as I was building the wing on a 35" Berkeley Aeronca( I know YOU would appreciate that, Larry!), and keep thinking it's not going to perform on a 91 without a cheater hole. And how ugly that would be. Also without REAL ducting I would guess that performance would be sort of slack.
What do you think it would be like at 10 pounds with a 46VRDF? Not worth bothering?

If not, a 500 sized turbine will have to do. I don't know of anything smaller that is AMA certified, yet.

I did not actually weigh the fuse, but it is built like a bassboat, and heavily gelcoated, too. I can certainly sense that the advertised weight seems awfully optimistic, though...