Hello I have been working on this project for about 3 weeks now. I watched Ernest's videos on how to put your barrel under tension to help with barrel droop and harmonics. I purchased the 14mm x 20mm 3k carbon fiber tube that he used in video and cut it leaving about 1mm longer on the length but then I was stuck trying to figure out the size and thread of the liner lock witch after talking to FX USA it's a 13mm x .5 pitch on the threads witch is micro threads. I hunted down a tap from McFaddendale hardware witch was special order and $25.00 but then I was in a position that I also wanted to be able to use my moderator so I needed 18x1 threads to put moderator on so things were getting more complicated so reevaluated the situation and came up with this. I took old .357 shroud and went to my buddies shop where we chucked up the original shroud and bored the cone out to 20mm to allow the 14mmx 20mm carbon tube to slide onto the barrel leaving about 1 mm longer then barrel length and laving the 13 x .5 treads from the liner lock exposed so now I slid shroud over the 14x 20 carbon fiber tube that is full length of barrel and the shrouds now can screw back onto the liner lock and tension the barrel. I will get some pictures of what it looks like in a couple of hours.