Playing the Pro at a distributor, I noticed that the playfield shows a lot of dimples even after 2 days in work, which means that the playfield wood seems very soft. A macrolon playfield protector should make sense in this case. Any idea how the protector might influence the magnetic strength of the magna slings? Would there be a noticable lower effect? I would not expect it, because the magnet works through the wood, so the thin macrolon should not significantly influence the magnet, but I am not sure. Any experience from other pins in this regard?