I did not want to start a new thread on an old subject, but I was unable to find any threads on the side curtains that some owners have. So, I will start a new one.
I never had side curtains per se. I had some panels I made from Plasticore, that's the material politician signs are made from. These worked pretty good, but they were extremely heat sensitive and would conform to anything they were against if it was hot. Also, they were extremely light.
I decided I could do better, so I purchased a sheet of 1/8" masonite which comes with one side painted white. I made a pattern from poster board pretty much following the lines of the old panels. On the opposite side of the white side, I put on a coat of Thompson's and painted it satin black as I also painted the white side.
Now, the paint job is more consistent than the pictures show. The camera effect did not do it justice. These things block a lot of wind and they help tremendously in colder months. I do not run them in summer. So, if you never did purchase the side curtains, this is another idea.