Could you post a picture of the 3D printed jig? I have a printer and would like to make one. It's a lot harder to get a suppressor here in the CommyWealth of Ma., I would not even bother, if I shoot subsonic ammo, it is pretty quiet anyhow.
There are lots of them out there and even free files to print from I think. I don't have my printer yet, though and it was so cheap, I couldn't resist saving an hour or two futzing with making one.