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- Continuing with the construction of the cover for the rear window.
I pulled out my Ryobi portable saw, and attached a fence to the bottom, temporarily, so I could cut a piece off of a full length sheet of plywood.
Cutting this way, will yield a nice straight cut, as long as the side you are holding the fence up against is straight. It's a lot easier than trying to move the plywood through the table saw, and takes up a lot less room.
- This is the joint that I will be using. This was cut with a 90 degree bit.
The bottom piece will be 3/4" thick and fastened to the wall. The top piece will be the piece of wood that slides back and forth.
The circle shows that there will be space between the top piece of wood, which slides back and forth, and the back wall.
The groove will hold the wood in place while sliding back and forth. This setup will be at the bottom and the top of the sliding cover. 

I left the center free of screws so I would have space for the router bit to be partially under the fence.- Finally had some time to work today. As you know, I am in the process of working in the bathroom area.
That includes the sliding window cover that I am making to cover the rear window.
In preparation for that, I made a high fence for my mini router table. That is needed for holding a high piece of wood/plywood upright, and straight, while cutting a groove in said piece of wood.
Used a pocket hole jig, screws, and glue, to fasten it together.

It is necessary to make sure the fence is at a 90 degree angle for accurate cuts. - Ever had one of those days where everything you planned went sideways, and nothing got accomplished?
Yea, me neither....... - Sorry folks. Guess my post last night was a little too far off topic, and was deleted.
Hope to have an update tonight. :) - Here is a different angle. If you notice, there is a Kreg clamp on the one piece of plywood, that looks like it is holding nothing together.
It is indeed, holding nothing together. I put that there to keep the plywood from splitting while driving the screw in. Works like a champ.
I decided to screw the plywood in from the end instead of using pocket hole screws.
- This was my setup while I was screwing this together. I used a short bar clamp to hold the 2 together until I drove the screws in.

- This is just temporary for the pic, as the right side is held up by a broom handle. Lol.

- In this pic, you can see that I added a piece of plywood to the end, and just screwed and glued the 2 together.
Notice that I left an overhang on both sides to allow left or right access.
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