I don't use any jigs to sharpen so my grinding can vary considerably? I have experimented with very narrow nose and 2" swept back wings to 70 or 80 degree nose bevels. I have 3/4 and 7/8" "V" gouges with long swept back wings. They are for roughing out bowls quickly. Both can hog off very large curls. I have a 1" "U" that I tried with swept back wings. Not near as effective. Ground the wings vertical and use it on the bottom of deep bowls. Very stout and works far over the tool rest. Most of my gouges are now either powder or cobalt metal sharpen on CBN wheels. I probably sharpen more often than ever. I can not work with dull edges anymore. Facets on the bevel are not a problem as long as the are far enough from the bevel. Finding a proper cutting angle for the particular type of gouge may be more important than the profile of the gouge. Whether it's a water pipe or D-Way, when presented properly they both can produce curls