Ebay Avenger internal Moderators?

Has anyone tried one of these PETE 3D Printed internal moderators for the Avenger? I bought one that has about a 3" extension past the existing end of the barrel.

Hoping it works OK. Very nervous to add an adapter and screw on type mod due to having 2 full paperwork cans for my conventional stuff and not wanting to end up under the intense scrutiny of our Fed Govt when I have more than those on hand should I get audited.

Let me know if your tried one and how it worked out for you.

Thanks,

Doc