tweakyllama

Ah thank you. That's the key info I was missing. I will try it when I get home

You'd need to change its keywords. Alter the keywords which make it two handed to make it one handed, look at the lead pipe or something similar to find these. As for changing it when in power armour, you could add a little papyrus script to the sledgehammer which adds these keywords to the object when its equipped (see here) so long as the actor who equipped it is in power armour (like this). You could also add a check for player so that it only applies to the player. Make sure you reset the keywords on unequip (or if not wearing power armour) or it will stay 1 handed. There may well be a better way to do this, but that's what I can think of.

Hey, I'm trying to get an object to perform an action (add a keyword or store a reference) on a companion or settler when the player adds it to their inventory. I've looked at the OnContainerChanged event, but this seems to give an ObjectReference and I can't find a way to check if this is an Actor let alone a potential follower. Is there an easier way to go about this?

That would look seriously badass