Considering the weight of the glass, at 52lbs a pane, got some aluminum C-Channel today. One to silicone onto the sliding edges of glass for protection. The other to be the track the window will sit in. I have the panels stood up on the edge to hold the Channel in place as the silicone dries. I couldn’t get it nowhere near as tight on the top unless I clamp it. So I’m doing one side today, then flipping them tomorrow.
Note: Today slide test show track fitment looks good. Has slight gap in guide channel to accommodate strip. But friction in raw aluminum will need reduced. Possible lubricant or Teflon strip with felt. I’m guessing for now..