I tried my first square-edge bowl today. The blank was a 5" x5" x 2" piece of Honduras Mahogany. All went well as I mounted the blank on the woodworm screw of my Super Nova chuck and proceeded to turn the back side of the bowl. I was sanding with a small piece of sandpaper, when my hand slipped and a couple of the wings cut two small, but deep gashes in my second finger. Ouch!
After a little self-applied first-aid, I resumed turning and finished my first square-edge bowl, a little wounded and perhaps, (hopefully) a bit smarter. Watch those wings!
Barry