Hey there - thanks for taking over the plugin FriendlyChap.

Do you think it would be possible to group items together and then limit by group? Like "electronics" group or "decorative rp items" group. Then set a limit for that whole group. My issue is lights, if I limit each to 20, people can mix and match different lights until they have 100 lights in their base.

Difficult. Right now the plugin is identifying the item to be placed by shortname, and comparing it to global and building limits, and each of the lights have a separate shortname.   I can see the utility of this idea though, as it would allow for classes like "building blocks", "Electrical" and allow for more granular control...

Extensive rewrite though, so it will take quite a while to see if I can even implement it.