It's a tough job, and the extra two feet will make it harder. You will need to do the following:
- Remove any nicks or bumps anywhere on the aluminum extrusion, then clean or polish as necessary to make it as smooth as possible.
- Get the instructions from Spindelberger or Williams and use the exact type of dish soap they recommend for lubricating the track.
- Trim the leading edge to help it feed in the track.
- You'll need at least two good friends - one to spray lubricant in front of you and one to push on the trim and spray more of it where you have been. Also to spot areas where it as popped out of the track. You will need to reward them afterwards.
- Will also need some vise grips to grab the trim for pulling. If you have lower back problems don't even think of doing this. It's tough. If it slips out of the track you can use plastic auto trim tools to push it back in.
- After it's in, let it sit for a few hours to shrink back to normal shape before trimming the ends.
Looks good when it's done, but not sure I'd do it again. Plan B would be remove the glider, park the trailer over flammable materials... Never mind. That's probably illegal.
Good luck.