Has anyone here replaced a Ruger Mk? trigger with a Volquartsen kit? I've got a MkIV that I'd like to get the trigger replaced in and thought I'd go with a Volquartsen. Can the average guy with enough knowledge to be dangerous do this? I've been quoted $250/275 to do it but I can get a kit from Midway for <$120. I know my way around wrenches and have built several AR's, but I'm not adverse to putting out the money to have someone else do it either. How tough is it?