OK, so I ordered the O-rings indicated on the schematics and rebuilt the Impact regulator. Took my time and only had a real issue with the O-ring in the block. Now I seem to be having an issue getting the trigger mechanism back in and working. From all the videos and schematics I've looked at, getting the trigger back in should be the easiest step. Anyone have any word of wisdom or special techniques to share? Thanks in advance.