I believe theres instructions in the faqs similar to that. Only Devcon putty was placed between forearm and spacer (where it's screwed on) to push the spacer back against the frame. The instructions go on to explain relieving and bedding the entire forearm to the barrel to help eliminate vibration.
I noticed some movement myself of the forearm and spacer near the frame. There was some movement there if you wiggle the forearm. I just used RTV silicon to stabilize the forearm. Judicious placement of scotch tape on the top of the forearm rails, Sahran wrap on the barrel, some paper stuffed in the gap just above the pivot hinge. Put the RTV on the forearm and put it in place.
This worked great! So later I taped off an area around the forearm screw, and put some silicon there too. Once the screw was in place I put a business card thickness of paper up front and tightend the screw. Let it dry a couple days and ended up with a tight fit at the spacer and barrel/frame mating area,
AND, a bigger than normal fit than just an O ring. And I believe the RTV aids dampening any vibration that
may occur.
Now add to that, a set screw under the forearm screw, with just enough pressure to feel the RTV contact the barrel, and it's the same pressure/amount of contact everytime.
This kinda goes with another thread here recently about where to place the forearm or frame when bench shooting and/or holding off hand and a change of impact because of this change. With this bedding I have little to no change no matter how I hold. The forearm is bedded to the barrel and immobile. Any changes I make from bench, bag, then to hand holding is much like that of a full stock gun.
