I sat down this evening a made a cover for my expression using the free pattern at Customcrops. Click on the picture to see it better.
I think it turned out Ok for the first go at it... A few tips on the pattern.
The instructions say sew 1/2 seam allowance, it was a little loose so I did 5/8 and also unless you are adding binding at the bottom I would place the pattern pieces about 1/2 in from the fold to have more of an allowance for the hem.,mine came out a little short. Make sure you print them out at 100 percent. It helps if you watch the first few videos on custom crops, she will explain how to put the pattern peices together before cutting them out.
Overall, this is very easy and takes no time at all from start to finish. I hope you give it a try.
Here is the link for the pattern.... pattern
Now, off to make a matching sewing machine cover.