Title. Allow us to use bonus fixtures beyond the main cap, but without any function or renting cost. Maybe keep the purchase cost, maybe remove it unless we decide we want to "activate" a fixture as our primary, but either way - free cosmetic fixtures without upkeep. Having multiple of the same fixture would be nice too. Active/inactive fixtures could maybe have some kind of cosmetic change, like the glow in the sword's stone for the Rally of Heroes only being in an active Rally.

Some of those fixtures look great.

Alternatively, maybe add them as a framework?