There is not enough discussion of bell knife skiver presser feet, beyond the different lengths. I thought deburring and mirror polishing feet of any origin would be enough, but there seems to be more to consider.
I have many inexpensive presser feet from China that I have polished to a mirror finish. These work fine for edge skiving but do not necessarily give the best results for panel skiving. Most of these presser feet seem to have a steep beveled curve that provides full contact with the leather just before the knife edge.
From observations of online videos, it seems that people who are getting more reliable results panel skiving are using a presser foot with only a very slightly beveled curve, almost a flat curve.
I hope we can use this space to share experiences with and pictures of presser feet that work well.