Just one more thing. With the Mark III before you can fold the mainspring back in you have to install an empty magazine. That is one step that Ruger left out of the directions. I had a lot of trouble my first time also. Trust me, it gets a lot easier. Calm down, take your time and follow the directions step by step. I used the directions the first three times. Now I can strip the gun in about 15 secomds and reassemble in about 30 seconds. If you need more help PM me.
I don't ever remember being absent minded.