Regarding gun barrels, if you don't want to drill them out (and not having a suitable drill is an excellent reason for not drilling them out) you can always just paint a black dot on them. That way they still look like guns, rather than cudgels that happen to be shaped like guns.
There's some cable and tech bits recessed in the backpacks behind the helmet that look like they're just painted an unhighlighted blue. I don't know if it was a specific choice, but it reads like you missed a spot.
The micron-applied text on the Chaplain looks good! Are you going to do something similar on the other plaques/scrolls/purity seals? As it stands, the Chaplain gets parchment with stuff written on it but the Librarian doesn't, and that doesn't seem fair at all.
That's a good idea about the gun barrels!
The cabling on the backpack was a miss, good catch. I painted this guy fully assembled, whereas the others I did without thier backpacks on...I'll see if I can get a little brush in there.
I'm currently not planning on doing the script on the smaller scrolls, I like how their shading and highlights turned out and not sure I want to put the wiggles on them. The next model I do though, I'll do the script before the shade and highlights and if that looks good then I'll do all the papers that wat going forward.
Regarding the librarian, I gave him a name (Dorian) and stuck it on his shoulder scroll so he wouldn't be left out.