For anyone who has experience with this, can I put the trunnion in the vise grip and install a brake that way, instead of clamping down on the barrel itself? I'm just afraid of damaging the interface between the trunnion and the barrel. The reason I ask is because the barrel is proving to be difficult to hold still without rotating along with the brake. I'm asking for people who know please, not merely what you think should be the right answer to this.