I've got a 7900 that I built from a brand new 6400 using the OEM 79cc top end. Other than occasionally needing a little more from the oiler on a 32" bar, there is nothing I don't love about this saw. It's still pretty much mint, but I'd like to keep it for my fall firewood cutting season for many many years to come. I see that Dolmar no longer exists and gas saw parts are also going away from Makita soon. If you were going to collect a stash of the most needed parts for this saw, what would be on your list? thanks!