Good morning. I have a SL1200GR, on an Apollo wall shelf. Cartridges used are 2m black, DL103R, AT440MLB. I've been using felt, Cork and the supplied rubber mats. Given that it's common for slight warpage of LPs, what could I expect to gain from a £40 Acrylic mat? I am also using the Michelle clamp. I'm struggling to justify it to my Bank Account!!!! Much needed help please!! EDIT:- NO replies. I can only assume that there are no benefits, apart from that of the manufacturers sales.