My Amazon Cloud Photos had photos from this day 8/1 from the Oshkosh 2003 airshow I attended. In the photos was a few detail shots of the Acapella 100 home built aircraft.

Its based of a BD-5 Fuselage but sports a twin boom design and a large O-360 motor

Info is limited on this aircraft however there are a few sites & mentions:

https://1000aircraftphotos.com/Contributions/VanTilborg/10103.htm

https://en.wikipedia.org/wiki/Bede_BD-5

https://abpic.co.uk/pictures/view/1033836

I could find no YouTube videos on the Aircraft.

Last info I can find is its still at the Whitman airport in Wisconsin

A close up of the nicely contoured cowling over the O-360 Motor. Should note the original BD-5 only had a 70 hp engine on average, less than half the power of this one.