That call was unbelievable. After several seasons mine finally quit sounding good. I think I sanded too much of the surface down over the years.
Wish I knew what the surface was. I have several ceramic customs and they all seem much harder than the sla-tek.
That sla-tek seemed between red slate and ceramic to me. You could sand it much easier than ceramic but not as easy as slate.
Played super easy and was forgiving. I find ceramic to glaze over and get slippery and it drives me nuts. Love it when it runs right and I have a few real nice pots but they aren't my goto.
I found one in a wood pot and it just didn't have the same sound.