FX What's the optimal bushing placement on a Dreamline Classic with a carbon fiber liner sleeve and a Superlight STX barrel system?

[OatmealMu]

I've been battling wandering POI after storing my Dreamline overnight. It's calmed down over the past few days. Maybe I tightened some things that needed tightening while troubleshooting. Anyway, I ended up buying a carbon fiber liner sleeve. The current set-up is a bushing at the breech end, then the carbon fiber sleeve, followed by a second bushing, and finally, an o-ring to help keep things from shifting. Is this optimal? I'm wondering if I even need the bushing near the breech.

Also, is there a more elegant way to keep the bushing at the end of the barrel from shifting? Maybe something that pushes against both the bushing and the end of the shroud? Oh, and is there somewhere I can buy a complete carbon fiber shroud? I remember there being a thread about someone buying shroud components then gluing them to a carbon fiber tube. Not sure how difficult something like that is for someone without a lathe.

 

[Long_Gun_Dallas]

On my crown I have one toward the middle and one toward the muzzle. The blast pressure always pushed the forward one back. It never moves. I cut the carbon tube in two and epoxied it to the liner. The middle spacer will never come off unless it is broken. Since it is sandwiched by two pieces of epoxied tube. In the case i jave to or it end up broken over time, I'd just get a 3d printed one to go over the carbon tube.

 

[Loff]

I have messed around with Dreamline barrel system, added CF sleeve and one bushing at the breech, one at the muzzle. I wouldn't cut CF sleeve in half - there is no point to have bushing in the middle when there is CF sleeve.
Try to bend that CF sleeve, it is impossible to a limit of common sense.

My Dreamline 500mm, .177 barrel shroud end piece (that with 1/2" UNF thread for moderator) is not just end piece, it's compensator. And in my 500mm barrel configuration I had to sand that barrel bushing a bit thinner to allow shroud to screw against barrel start/block. That means that CF sleeve was quite tightly pressed between those bushings (one at the breach, one at the muzzle).

In my FX Dreamline videos You can see that.
In this video starting at 04:40

And in this video, starting at 10:25, I'm building 600mm barrel form 500mm barrel:

In this video, starting at 10:28, You can see what I had to do to correct my mistake of ordering wrong end piece for my 600mm barrel shroud. Correct would have been to order that compensator thingie not just end "cap". So I had to fabricate some bushings and sleeves.

That compensator looks like this:

I hope that helps!