well, today is a frustration. I ordered a tri lug mount for the big boy x. I put the mount on, swapped over my form 1 to a sico mount, and stuck it on.

As you can see it's a nice mount, that will allow you to clear the tube for loading or unloading.
With form 1 sico cap on

Looking down the arse end of the can.

Sorry for the crap photo.
The problem: When I put my suppressor check rod down the can and to the barrel, I noticed that the can wobbled. I checked, and sure enough, the can wobbles. I checked the can to make sure it was mounted properly and checked the front and rear end caps. yep, can is tight together. I thought well crap, so I pulled the rear cap off, and sure enough, the Sico mount wobbles on a 45 cal trilug. Usually, they don't fit. I have had excellent luck with this company over the years, but this is going to be a problem as you cannot have your can wobble.
So, I put the threaded end back on and checked it again, thinking this may be part of the accuracy issues; maybe it isn't only the trilug mount but loose threads by henry. (happens more often in the suppressor world than you think) Nope, can is nice and tight. and keeps center when I put the bor rod down the barrel.
So I took my form 4 dead air ghost m can and the 9mm /40 tri lug mount of theirs, and it fit. It is still loose on the mount thought. I have two other 45 acp tri lug mounts. One from hk, and one from bnt. the dead air mount does not fit either. I put the dead air can on the rifle and dropped the bores check rod and fudge; it still wobbles enough to hit baffles.
The DA ghost m is quite a bit shorter than my form 1, and it has a slightly larger gap between the bullet and the baffle. The rod touches two of the baffles with slight pressure.
Well, crapstix again. I put the threaded mount on the dead air and drop the bore's clearance rod, and push. nope, it keeps center and has no issues with touching baffles.
So tomorrow I get to call and talk to the company, hopefully they will take this one back as it is unusable with either of my mounts.