I use spokeshaves some. Your struggles with the curved bottom type are common. Congrats on figuring out how to make it cut. Many give up thinking it's the tool. That is also a very nice custom jig for the short blades. For others that don't have the custom jig - I tape the short shave blades (and some of my small plane blades) to a 2" Stanley plane blade and use the square jig to hold. Any long flat piece of steel will work. I use masking tape wrapped around the holder and blade.