Thomas,
That Manual is kindly posted by Keith Hardy - we all benefit from his efforts to post old documents.
I thought I had seen a write-up and you have found it. However, it does not help much in explaining how to form the run channel, but it does show the locations of the two screws ("A" in the picture in the Manual) that hold the run channel in place. Those are the only screws for the run channel.
The instructions do not refer to the metal strip that is installed at the inside bottom of the glass after the run channel and sliding glass are installed.
Here is an attempt to explain how we formed the run channel:
Two people are needed.
1. Looking at the picture of the window in the post above, hold the rear end of the run channel in the widow frame such that the end of the channel is halfway between the screws, and the run channel is running forward (to the right of the picture). You could leave extra material on the left side of the run channel and trim it off later.
2. The run channel needs to be bent to form to the widow frame at the forward side. This is not so easy as it sounds, because you have quite a long length of run channel to work with.
3. As one person holds the rear of the run channel in place, the other person bends the channel downwards. To make the "perfect bend, place the sliding glass in the channel and push the glass forward, forming the channel to the forward shape of the glass. The top of the glass will be against the window frame and the bottom of the glass will be tilted inwards, because the rest of the run channel in pointed downwards (you might have to be there to understand this).
4. Now the run channel has to be formed around the bottom of the glass - the glass has to stay tilted out until you bed the run channel around the bottom of the glass and the glass can then be moved into the window frame.
5. Now the run channel can be routed to the bottom rear of the frame and bent upward - a lower bend upwards and then an upper bend forwards.
6. Where the ends of the run channel join together between the two attachment screws ("A" in the picture in the Manual), you might have to trim the ends).
Once you have the run channels formed, you may dry fit all the parts and then install and seal the glass and channels as described in the Manual.
My explanation above is terse - ask questions and I will add information and/or clarify.
Tim
Here is an alternate method for #3 and #4 above:
Place the sliding glass into the "closed position" in the window frame, and measure the length of the run channel from the rear of the sliding window to halfway between the two screws ("A" in Manual). Form the run channel around the sliding glass on a benchtop - using that measurement for how far into the channel the glass needs to be placed-and-held as you bend the run channel around the glass.
