There are several folks ok MCB who can rethread the trracer.
With the velocity up, and original barrel, its the loudest on the field :-) Now it is much quieter.
I got the 45 frame off a spyder clone. Many old spyders use the bolt on grip frame.
Barrel options are almost none. Even the ones you can get won't stop roll outs.
I use a 45/45 tank but would like a 13/30.