So Ryufa is nearly the same as Shukumine No Passai (Dai) of Gensei Ryu, if I understand clearly.
I just stumbled upon the name of the kata, while searching info on Soko Kishimoto. I didn't quite find out what you came up with.

I'd love to see the Ryufa and the Shukumine No Passai to find out how much it is different form the Bassai we pracice. The Karate I study is derived form Gensei Ryu.

I bet there are minor diffenrences.

I haven't seen that much of Higa's Bugeikan.

Thanks for the input.