Yeah, my gun is very accurate too. I was hoping to squeeze a little more accuracy out of her by stiffening the barrel with tension and hopefully reducing vibration. That was asking a lot though...My gun is capable of 1/2” @50yds and 1”-1.25”@100yds very regularly. I’m talking five shot groups over and over again, not just occasionally or three shot groups, or cherry picking the best groups. Not trying to brag, just give you an idea of my gun’s capability and what I was trying to improve upon. It was asking a lot. The results didn’t show me any improvement in accuracy but like I said, this might work great for more powerful .25(80-110FPE), .30 or .35 cal. I really wanted it to work, especially since it was my 3rd attempt at different ideas and because I spent some money on the carbon tube. Just to specify one more time...The interior shroud is 14mm. I bought 14mm ID x 20mm OD and it slipper over the inner shroud perfectly. No sanding, buffing, lubing or anything necessary. It was a perfect fit. Some have emailed and messaged me about running the carbon fiber tube under the large external shroud. It can be done but you would have to modify the shroud quite a bit. Good luck if you proceed!
Stoti