This is probably a dumb question, but I'll go ahead and ask it anyway: is it okay to place synths on a metal surface? I mean, would the surface harm the synths in any way? I'm asking because I have very limited space to accommodate my ever-growing synth collection and I've been looking at warehouse shelving as a solution (building upwards!). The thing is, the shelves are usually made out if metal. I can't see why it would be a problem, but it is better to be overly cautious in such situations, I reckon!