BB---The Ol' yeller and the Sla-tek are patented, so the frictionite must be substantially different or else patent rights would be infringed. The only way around that, of course, is if Primos paid Knight & Hale a commission to use and alter the patent.

I've got way too many friction calls now...I just make new strikers from different substances for new "sounds" I'm personally moving on to making my own diaphragms, whole lot cheaper than $5 a pop for something I might blow out in one Spring.