Im pretty sure i have the one from the last picture, I left for work, and will be back again on Friday, i will look and see for sure. But I'm 90 percent i have the one with the gear on both.........Thank you for the pictures, now i know what I'm looking for, Maybe i will be surprised and have the X type!
Im not sure which one is easier to work on, they both seem hard, its must be either a roller on the bottom on the style in the last picture, or a broken X style mounting location.....