So the "my Glock fell apart" thread got me thinking. I'm going to hit 10,000 rounds through my gen 4 19 probably this November or so. There's been no failures at all with it and the only thing I've done is change the recoil spring at a bit over 5,000 rounds. How many of you change out springs, etc. every 10,000 rounds? If not, is there any set interval you have for spring changes, etc? This is a carry gun. I already have spare parts, but haven't seen the need to change anything as of yet. It's been a perfect gun. So how many rounds between spring changes, etc.? Just looking for a consensus.