From the time you got the first part for the build to the time you considered it completed...
"Yep, I've had this grip frame ready to go, I just need to get my lower tube, long breech, barrel, sights, bolt, and trigger assembly! Maybe next month..."
I'm pretty sure back when I played paintball, I had some components for guns that I never even ended up owning.
Crosman 2400KT from Crosman's Custom Shop
Bought summer 2009
Custom parts fall 2009
Valve job tuning it to 12 fpe 2010
Bulk filled summer 2013
Three years + - . Tube & breech came first and the rest was added as conceptionalized & afforded.
Started the design of this one in March 2015, "finished" it in January 2016. Designed to be a 10m freehand rifle for me and my kids. 3 pumps yields 465fps.
1377 based design, with a PM66 compression tube & linkage, flat top piston, reduced volume FT valve, LW 19" barrel, hammer preload adjustment, 1701P trigger, steel breech, etc.
The LW66:
(https://www.snapagogo.com/images/2017/07/25/Crosmanpair.jpg) (https://www.snapagogo.com/image/LEZCs)Uploaded at Snapagogo.com (http://www.snapagogo.com)
Currently gathering parts for a 7/8" tube multipump, similar to above, but trying for + 12fpe (poor man's field target gun).
JMJ
About three years to get the .30 up and running...course I changed jobs, set up at home and also ended up starting completely over with it too...
Done now though. :)
(https://i.imgur.com/150UoQel.jpg)
Al