Stupid simple idea.. Drilling 3 small indentetions matching the diameter of the grub screws, into the barrel where the 3 grub screws contact the barrel, would make it nearly impossible for anything to go wrong.. It could not be pulled out, twisted out or knocked loose. Forever.
Now its only held in place by the clamping force of 3 small screws against one side of the action.. And some Loctite.
Saw a video on a few weeks back of an American having a "accident". Because the custom barrel of his T1x was not pushed far enough into the action before he tightened those screws. Off by 30.000 of an inch? How do you write that in mm?
Ruptured the 22lr case, ruined his magwell and his magazine disintegrated.. Luckily nothing happened to him.