Flexy rack threaded rod material


It seems that brass is the universally accepted "best" material for the threaded rods of a flexy rack, but has anyone actually compared brass rod to any other material in a flexy rack in the same room and in the same system? I'm having a little problem shelling out 3x the money for something that is supposed to be better even though no scientific proof exists (or maybe it does, I just haven't found it).
ketchup
I agree with Tom6897. I have done the Flexy. Its simple design encourages upgrades and tweeking. Unfortunately it is not a good design and is ironically beyond improving with "upgrades" like brass rods. Ikea's lack table is much better, although I am not completely sure they are made the same way. They are cheap enough to buy one for experimentation. If you flexy, don't use MDF. It sounds bad, period.