Silver or Gold?
Thanks for this great post Shane. I couldn't figure out why my key would snap back into the horizontal position instead of the correct vertical one. After reading your post, I realized that there is really only one way to configure the cylinder correctly. Once I realized that, I realized that I was using the wrong middle plate. The kit comes with a silver and a gold middle plate. I used the silver one (for hours) and when I switched to the gold one, it worked the first time snapping back into the vertical position. I couldn't tell because that was the broken part on my cylinder. Also, on a different site, someone mentioned they were successful using the silver one so I just took for granted that that was not the problem. Seems like the Silver plate is for right sided doors (Europe) and the Gold plate is for left sided doors (North America). Just wanted to save someone else the trouble I went through.
Thanks for a great and detailed post.