Well I just shipped off my two 30P-1's to TBAC for the re-core upgrade and changing from direct thread to the Compact Brake system. It's kind of difficult to imagine they can be improved upon but the crew at TBAC have always exceeded my expectations so we'll see? Of course, I have to pony up for 5 brakes but I guess the solution for that is not to have as many .30 cal rifles...........not!