Great back story! I really appreciate a good sandblast finish, and at the top tier of the ones I have are my Tinsky pipes which were all blasted by Rad Davis. I have but one Rad and it has a fine blast as well.
Brian G. Rowley (Growley) also does a fine job of sandblasting. My 2 from him show a lot of very nice grain, one in particular.
Scottie Piersel is also no slouch at blasting. Have a couple from her as well that testify to that.
Have but one Dunnie, an older estate Shell Briar straight 'dog (forget the year, but 60's/70's vintage iirc) that has a decent blast without being overly craggy.
I've some other blasts that are fine in their own way. I do rather like the tactile feel in the hand.
Ashton will be a marquee that I'll get in at some point.
Cheers,
RR