If your gun is a 40 now , it will be hard to make the 9mm rim work as it is about 15/18 th's smaller than the super. the super is only about 23 th's smaller than a 40 but the 9mm is about 40 th's smaller.
Hell, if somebody will send me one, I'll let you know what it will do & not do for 3-gunning, what benelli parts will work or not. will return in as sent cond.
The clark barrel's,as most barrel's today, shoot better than the shooters can. I have used them & their qualty is outstanding. The bore finish is a mirror finish & better than most. Anyone who say's their current barrel's are questional. has not tried one.
Haveing shot a zillion texas star's w/ all three gun's, I can tell you yardbird that you want to use tactical #4 buck on it at any range, not wimp #8 shot. have seen other people leave one hanging w/ light loads but not with #4 buck.
There's nothing "trick" about a 6" light gun. Some people simpley shoot them better, as some shoot 5" boat anchore's great & some light 5" great. Different stroke's for different folk's.