Foam of Grianter

So I got some questions about adjustments to the Longshot Angel Breech. I don't own a Longshot or any brass pipes.
I read somewhere online before that 17/32" brass was the best size for doing barrel replacements. In the original Angel Breech, 9/16" brass was used for the barrel, which is a tad bit looser than 17/32". If I were to use Modified Nerf streamlines (OD of 0.5") wouldn't 17/32" brass barrels (ID of 0.503")get better performance than 9/16" brass barrels (IO of 0.535")? Has anyone ever tried using 17/32" brass for the barrel and 9/16" brass for the bolt? I thought about it a bit and 17/32" does have a bit more friction while 9/16" allows more air to leak, Another idea could be to nest some 17/32" inside the bolt receiver end of the 9/16". The initial friction from the 17/32" will allow the air pressure to build up more. Although, this idea is like creating tightening rigs or 9/16" but 17/32" is smoother than t-rings.
On the bolt of the breech, I was thinking of replacing the 1/2" brass with 1/2" aluminum. The aluminum has an ID of 0.4375", the brass has a ID of 0.472". I was guessing that the tighter ID of aluminum would increase air pressure thus improving range (and slightly softening plunger impact). I've actually tried the straw inside the bolt idea on my recon. I used thin straw (ID is 5mm), hot glue and silicone but I remember ranges actually decreased a bit. But maybe ranges reduced cause I did something. I remember my O-ring sucked at the time and I was very messy with the hot glue.
Another question I have is,has anyone tried the Angel breech variants on the other CS blasters? Was it effective. I've done calculations with plunger volumes and bolt lengths to find maximum barrel lengths. When using 9/16" for the barrel and 1/2" brass fr the dart pusher the maximum barrel length for inverse-plungers is 2.5" and 6.3" for the stampede. When using 17/32" brass for the barrel and 1/2" aluminum for the dart pusher the maximum barrel length for inverse plungers is 3.7" and 7.7" for the stampede. I didn't even factor in possible air leakage. I also didn't factor in if the forces from air pressures/air flow was greater that the forces from friction/air resistance in the barrels. So actual maximum barrel lengths are shorter. And you'd probably have to create some bolt locker mod on the stampede to make sure the dart exits the barrel before the breech opens.