Someone a few pages back mentioned that the multiplayer DM weapon flag doesn't work with DRLA because of weapons being replaced with CustomInventory actors, I figured I'd take a crack at making a fix:
Weapons are replaced with dummy actors inherited from the Weapon class, to trigger the flag and remove the DM weapons as necessary. Once that's done, the remaining actors spawn in their respective weapon CustomInventory actor, then deletes itself, all within the same tic. There are probably some edge cases that I haven't thought of that would break this but it seems to work well enough, test it out on your next co-op session! Then yell at me when something breaks! I would greatly appreciate it.
Download here. Load after the main DRLA wad.