Tuning FX Impact Barrel Smooth Twist X Superior .35

Hello dear community.
I would like to share with you a short experience with the FX Impact Barrel Kit Smooth Twist X Superior .35 caliber. I am writing here for the first time, and English is not my native language, so I ask you not to judge strictly about possible mistakes.
So I recently got a .35 barrel for my shot.
I installed the barrel, tightened the locking screw, fired about 100 shots. decided to change the barrel to .22. unscrewing the screw with great difficulty removed the barrel .35, upon examination, I saw that a locking screw with a sharp round edge cut a hole in the transmission hole, behind which the sleeve was visible. at the same time, the copper part was deformed, and therefore the barrel came out with difficulty. when installing the .35 barrel, the screw was not tightened tightly; After inspecting the copper transfer port, I saw that the wall thickness is where it will be tightened with a thick, paper-thin locking screw. in my opinion, not a very good engineering solution ..
I don't put the barrel 35 on impact now, as I'm afraid to damage the sleeve with a locking screw.
FX says spare parts for the kit are 35 cal. they are currently absent and it is not known when they will appear.
I am sure that not only I faced such a problem. perhaps some of you have had a similar case. Please share your thoughts on how to get out of this situation.
with respect...
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Thank you all. I really appreciate the humor. So I did the following - I drilled a blind hole in the lock screw. inserted a brass bar there. then he took a tool for a tractor and crushed a brass bar with it in a previously prepared threaded hole in a piece of metal lying in the garage. then sandwiched it a bit with abrasive paper. Installed in impact. probably by far this is the best I could think of.
Thanks to the dear "triggertreat" for his sense of humor!
At home, 30 meters, a group of one and a half caliber, on the weekend I'll go to the farm to shoot 70 meters ...
results in the photo will be.