yeah i had one 24mm copper, the round copper ones hit hard, but it's real hard to use with thick wires (stuff like aliens), traded it some time ago but nice mod.
whats great about kennedy is that they give lifetime warranty on everything from them. I've bought from them enough that these days i get stuff done for free normally (have had 2 cerakote jobs free, the copper ruby i mentioned done for $20, new caps, 2 new buttons, etc, all free)
NO ONE will give you the support on your stuff like kennedy does, that's for sure.