Album above updated with a few more WIP pics. Working on the replacement screw modification for the muzzle; similar to this build on whitearmor --
http://www.whitearmor.net/forum/topic/19872-dm101-doopys-e11-blaster-build/Screwheads are now all sawed off and ready to be glued -- just need to make the holes for them in the resin.
Working on the muzzle of the E11, I used a dremel-press to make some guide holes for a 3/8" drill bit; don't have a press for a normal drill so I figured I would just get some familiarity with the dremel and worry about the how to clear the full hole. I then figured maybe I could just hollow out the appropriate size hole by moving it around in the press and that seemed to go very badly.
One the hole that went well, I used a 3/8" drill bit as a "hand turned bore" and that worked out great. I will repeat this with hand grip mod later.

On the bad hole, I quit before it's totally wrecked. It's smaller than it needs to be, but I can't use the hand-bore method here anymore since the bit won't get situated. I may try and find something to patch it with, and then redrill it?