I learned to take my Glocks apart from watching a youtube vid. I am not mechanically inclined, but I do posses enough common sense to keep me out of most trouble. Whomever is even slightly interested in a complete detail strip of their Glock, find a vid and go for it. Once you've done it you'll do a face-palm and say "what took me so long".
I did the $.25 trigger job on my three Glocks and maybe I can feel a difference or maybe not. I used an old rag, some Q-tips and a bit of Flitz. All the parts in question came out with a mirror finish. Maybe that all was a waste of time, but I sure enjoyed doing it.
Also, while I was in there, I installed a Lone Wolf 3.5lb connector into my Gen 4 27. I took the dot connector out of the 27 and put it into my 26. The pull weight on both guns was decreased, but the LW connector added substantial difficulty in racking the 27's slide. So I switched the connectors in the two baby Glocks and came out with a winner. The original Dot connector in the 27 is pretty sweet and it racks just fine. The 26 is not as crisp as it once was, but it's much lighter. I may order the Glock OEM Minus connector from a vendor and give that a try.
Anyhow I would not have had all this fun had I not ventured into the unknown.
Good luck guys