I use a PES and a T8 and to me therfe is little difference in sound moderation,obviously the PES is S/S and as such should last longer,but,if you put your mod in the airing cupboard or on the boiler when you get in it will get rid of all of the moisture that is inside after you have shot it. I did used to use WD40 but found that the zero would take a couple of shots to get back on,so stopped that,I have had mine a long time and absolutely no sign of rust.Also Jiggy if you send it back to...............................http://www.reflexsuppressors.co.uk/ They will do a deal on a new one as stand