OK, today was the first day I needed to replace a part.
But silly self was cleaning the mod, as is my custom every week. I lost the spring somehow. Just got back from the hardware store. Have a new spring. Their spring was too long, so we cut it exactly in half. Now I have a spare. Total cost: 44 cents, gas not included.
THIS is what I'm talking about! User servicable! Thanks, BadNinja!
-Johntodd