Swamplizard

I run ASD8s and need some smaller pitch 4 blade rolla props as spares and primaries. I found some cheap and they are speedmaster props which fit "big shaft IV IIIA, V, VI, and VII."

I hear there are adapters available to go from 19-spline to 23. Does anyone have a CAD drawing of one. I have a buddy who can make em for me if I give him the detail specs.

Trying to avoid spending $700 to mount props that cost $300.