Hi my friend who is taking up BP art would like to pose a question via my self are SLIX(maker)shooter nipples better then the nipples supplied with gun as new and what advantage if any would you gain by fitting these as you know I haven't a clue so I've turned to you for help they have a vent hole drilled though them and also where can he buy them in the uk or would he have to buy from are cousins in the USA thank you from Frank