I took delivery of a 2004 SG with terribly scratchy pots. One actually CUTS OUT entirely at 9-10 volume range!. Bummer. What is the proper replacement part for a 2004 Gibson SG Standard? I see 300K and 500K pots around (parts #PPAT-3XX and PPAT-5XX respectively), but I am not sure if any of these are the right part. I want to keep it all 'stock'. (Also, is it even worth spraying these things with lubricant as extended cure?) Thanks!