I'm coming up on 5,000 rounds on my G19Gen4 soon. As soon as that happens I'll be detail stripping it, cleaning it, replacing all the springs, probably shoot another 100 rounds through it and then do nothing to it except carry it while I put close to 5,000 rounds through the G17Gen2 that I have. It's interesting that you bring fitment up between the G17 and G19 up as I've just recently discovered while doing a side-by-side comparison on drawing them from the holster that the G19Gen4 with no backstrap and G17Gen2 give me essentially the same LOP. I suspect this has something to do with where the hump on each of those pistols interfaces with my hand. It's definitely interesting though. I look forward to really working with the G17 over an extended period of time to see how it works for me. Who knows, I may end up preferring the G17 in the end.