Well, the rulebook makes clear that people can adopt items made by others. The book also makes clear that Warden swords come with job responsibilities - from a game perspective, that helps explain why they're more powerful than things most people can make. It's conceptually like a person with a +2 Resources purchasing a private jet for the use and with the resources of a +6 Resources organization.
Luccio isn't sure when someone will be able to adapt her design - which suggests that item creation is highly personalized, not surprising, and also that making the swords is more complex than the items most people have experience with.
Probably there would be a certain amount of learning how to adjust to an item's "power feeds", except with items that were designed to be easily transferred. In Skin Games, Bob seems to have a very easy time powering the wards on Harry's duster, but he not only observed Harry making the thing but advised him on how to do so.
I suspect other people would have to spend some time analyzing an item before they could provide the right kind of mystic "battery" for it. However, just as the novel making-of-potions requires lots of time and the process is heavily abstracted in the game, I'd say the same thing holds for transferring magic items.
Short of something like this being showcased in the novels, that's probably the most 'canonical' guess you're going to get, and it's a reasonably straightforward GM-call. Change it if you feel like it, but I think it's an acceptable default.