I've always thought the rotary should be recovered, put on a new, straight frame, no body, and put on display next to the other one so people could see the mechanism.
I once sat by the rotary for several hours listening to tourists explaining how it works, usually to the wife and/or children, and usually wrong*.
It would be great to have an inside view of one.
Bruce
*Steam engine inside = small locomotive on a treadmill style mechanism
Big propeller pulls it through the snow.
Gas or diesel engine turns the propeller.
Big screw screws into the snow and pulls it out like a cork,
Etc., etc. etc.