I bought the mrod air air max pistol and a chronograph to teach myself tuning. I have seen the UK you tube on trigger polish and another page on adjustments. it all seems straight forward but on one forum it talked about applying self sealing material to the adjustment screws. I cant find that string to find out anything more. anybody tuned one of these can pass on ideas. I lkie this pistol so far and if im gonna screw it up i want to do it right