Great photos. Sure would like to see those birds in person someday. I'm assuming that's a Ranger engine on the Fieseler?
A bit of idle musing ...
A few years ago, I learned about the Fokker D XXI while reading Green and Swanborough's "Illustrated Anatomy of the World's Fighters." The D XXI was a mid-thirties design, a low wing monoplane, but with a steel tube fuselage, wood wings, fixed gear, and fabric covering. A big homebuilt, more or less. Building a D XXI replica would be, if not exactly easy, certainly less challenging than an all-metal type.
With an 825 HP Bristol Mercury engine and a two-pitch prop, the D XXI had a top speed of about 285. Hang a P&W R-1830 with a Ham Standard prop on a replica, and you'd probably get pretty close to 300.
Her's one of the survivors, at a Dutch museum.
