I have a little project where they knew something was amiss with the rigging - 30 or so linesets from the 1960's I'd estimate, wire guided arbors, from a manufacturer long out of business, and from an era where most parts were cast iron from scrap, basically ignoring a lot of metallurgy good practices. Looks like it was installed just a day after they stopped using clove hitches to attach the 6x7 wire rope to the battens. They said they wanted to do it right but I don't think they knew it was more than some adjustments, lubrication, and maybe wire rope. Facilities people get cold or hot, and understand the boiler or ac has to be replaced. Black water down the hall, and plumbing has to be replaced. But try to tell them rigging has to be replaced and you'd think you were asking them to replace the dirt under the footings, which they would do if there was a pollution issue. So I present three options from fully motorized to all dead hung, in the $100K to 500K range, and only then do they say they are thinking $20K. So, just a reminder that rigging does wear out. I tell my clients today that without motors but with basic maintenance, 50 years except 10-20 yrs on curtains, probably 25 on track. I don't want to talk about motorized rigging life because almost no one would install it. My point is don't get mislead into believing non-motorized rigging lasts forever.