I make no guarantees, and this is the advice of an inveterate packrat. Grabbing half a system "just in case" the other half turns up is the precipice of the slippery slope to crazy old coot compulsive hoarding hell.
"GIT AWAY FROM MAH BARN YOU KIDS"

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I am finally on the downhill side of packing up the results of that slippery slope and storing it in the attic. I think I started back around December by planking more of the rafters in the attic. My room is almost clean. I am nearing the day when my workbench will be cleared. Then it will just remain to sort, document and pack the remaining piles and off to the attic they go. Probably never to be heard from again. Of course, I'm keeping them because of the delusion that one day I'll get around to the project that each item represents....