The key point I see on that spoke shave is how low to the work the handles are. I have never been able to make the spoke shave with high handles function with out is rolling over onto my knuckles. My only spoke shave has handles almost flat to the blade/sole.
In my video you can see how dusty that jig is, I cringe when the client asks for cut curved braces. Wider stock, longer mortices, more work,