Quoted:
Mine are off center. I think I'm going to have adco make an off center adapter to make it centered on standard 762 thread pitch cans...if that makes sense.
I'd ask if they can actually do that. Even when it's bad enough to put you at risk for a baffle strike the eccentricity of the threads isn't that huge, and timing such an adapter, so that you can guarantee you're re-centering on the bore when you screw it on may not be possible. Normally the threads are just re-cut entirely.
If you're just looking to make an AK quieter for backyard shooting with neighbors around etc., go ahead and get a suppressor for it. (Note the guy in the video above made no attempt to remove his ear protection...) If you're looking for anything even close to "movie quiet" chose a different gun to suppress. The gas leakage from the AK's intentionally loose clearances, (not the same thing as loose tolerances) and just the action cycling under full recoil makes a suppressed AK as noisy as some unsuppressed guns.
I was going to get a suppressor for my Draco, and my FFL/SOT spent some time educating me as to why it was a bad choice.