fuse room problem

[Something]

Is there anyway to redo my wrenching on the fuse room? I though rare would mean it would have an upgrade not mean i would never see it again :(

[Gorlom[Swe]]

another wrench or the conservatory
Since it is a cog-room you can use an [elector magnet] to make it more likely to appear in order to wrench it again

[McGeorgeOfTheJungle]

The trading post might be able to swap an item for a wrench and just hope to god you get the room again, you could also try and get the Solarium via the drafting studio which increases the chance of rare rooms appearing, or as said above the conservatory and hope it shows up as an option (the conservatory requires you to do the music puzzle) to know where to get it if you don't won't to be spoiled on it's actual location. Or the electro-magnet has a chance of showing mechanical rooms can be built in the workshop if you have the correct 2 items to make it.