I just got finished replacing the bottom lift channel on the backglass of my TOTAN. When doing so, do not try to slide it on. It will be extremely difficult. Instead, do the following:
1. Lay the backglass facedown on a towel on top of a table with the bottom edge of the backglass hanging over the table
2. Center the bottom lift channel along the edge
3. With a rubber mallet or a hammer, lightly tap the lift channel into place. You may want to hold a 2x4 over the channel so you are tapping the wood not the plastic channel
Enjoy!
I wish someone had posted this before I tried to repair mine...