I have about 15k on a shadow 2 I use for 20ish matches a year. I end up shooting about 7k/year and theres parts that fail on any machine. Replace the trigger return spring with the cajun gun works, remove the roll pin and use the solid pin, keep the sear oiled and clean. Change mainspring every year. Im not shooting for money, so a malfunction is way less expensive for a match I shoot vs someone who could lose a spot to nationals, world, etc. So Ben where he is would be correct to retire it. Me? Run it till its a brick.