It turns out our Silver Ice Dance/synchro skater sharpens his own blades, and a former National level coach at the rink gave him the thumbs up as a sharpener. This skater is the one who I referred to as 'the one who skates with sprezzatura.'
I sat down next to him in the lobby as we were booting up and asked, "So, now that you do your own sharpening, what's your radius of hollow?"
"13/16 ths." He replied.
Say hello to our Badass Skater....cause Sprezzatura Guy takes too long to type!