I think this plays into what you are about to do.

The first time i did this I couldn't figure out
why the cylinder wouldn't release all the way. It
was because of this spring (pictured below) holding it
somewhat in place. I posted this pic a while back when
someone else was dealing with this situation.
Hope it helps you.

I wish I had seen the other picture when I first
did the fix because I didn't slide down the rubber
piece that was covering the pin and i had a heck of
a time finding where the pin was.....LOL.

I used a thicker piece of a paper clip as the pin and
it has worked fine for 5+ years now.

Good luck!

Karl