With the inclusion of the flashlight/lamp only slot, that threw everyone else's inventory slot number up to three. What I'm trying to say is that Delroy could have five slots including the light source only slot, but that would make Bagger more powerful, but hey, it's your decision whether to add it or not.
#Delroy's inventory
calm hull
short gull
What if there was a level 20 perk that could allow him to start with an extra inventory slot (so he would have 4 including flashlight) and then he unlocks a 5th slot