We intentionally designed the elevating rack system to have extra compliance (play) in the supports so that it can telescope properly for it's intended use. Unfortunately this "noisy rack" is a side effect of that additional compliance which is caused by the vibration and rattle of these moving parts. In short while it doesn't pose any structural or functional issue it can be for some a minor audible nuisance.
We have been working on and testing different solutions for this concern and we have come up with a field fix for anyone that has interest to reducing the noise.
It involves installing two nylon tipped set screws(as shown below) into each elevating rack outer support bar.. so eight of them total. The nylon set screws are used to tension(clamp) the outer and inner bars to reduce the compliance as mentioned above which reduces the vibration and subsequent noise. The set screws need to be tightened for transport/travel and loosened to raise or lower the rack((takes a 3/16" allen wrench).
Installing can be a bit tricky because the inner bars need to be removed first (so the rack itself needs to be removed or lifted off)prior to drilling and tapping 8 holes in the outer tube. If anyone is interested I can provide the set screw detail, dimensions, hole and tap size for this.
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