Thanks Chuck,thats what I was wondering.Mark C threaded the barrel for a 30P1.I was hoping the brake attachment and can have the same lenght shank and threads and basically would convert to a BA can.Sounds like the 30p1 can wont screw on the TB BA.Guess I should have ordered the BA can to begin with,but that would be too simple.That RD precision brake looks like it would work for a quick fix.Same threads,spin it on,time it up and lock screw check clearance.Yea or nea?