Congratulations to Jeff Jackson for Spalted Myrtle Urn being selected as this weeks TOTW!
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Depends on where the V arm and the rest of the jig is located. I went from 6" to 8" things changed a little probably due to the accuracy of how I mounted the hardware. The actual bevel of the tool changes very little. Same thing happens when you replace a worn wheel with a new wheel.
The big difference is the increased concavity of the bevel on smaller wheels. A micro bevel and or honing corrects for the concave bevel.
The concave bevel is a tiny bit harder to control since the cut wants to follow the bevel. A tool with a concave bevel wants to cut deeper all by itself. I hand sharpen my spindle tools so they have a flat or convex bevel.
Bowl gouges I use straight from the grinder.
The angles are not dependent on wheel size -bevel angles depend on the supporting geometry of the mechanisms - platforms, vee pockets etc.