I've maxed out at six, for two reasons. One, at that particular point in time that's how many I had on the bench to hone in one sitting. Two, my fingers got a tad sore....so if it happened again, I think I'd limit it to six.

I'm comfortable with 4 at once. Mostly because I'm still a toddler when it comes to the life of a honer like Glen, Max, Sham or Lynn.