I made up the plus size version of these (No. 15) in size 48. See the girl sitting down. The only alteration was to shorten them three inches.
I haven't put the waistband on them yet, but wow, the fit is so great. I like that instead of just grading up the regular sized pattern, (and therefore assuming your bone structure grows as you get fatter) the plus pattern is completely different, based on a plus sized block.
Here is the fabric I used for the pocket lining. (BTW, the pockets are really shallow.) I'm also using it for the waistband facing.
Back pocket detail. The embroidery design is a built-in from my Brother PE-150.
My topstitching skills are a bit rusty, but it comes back to you. The worst thing was on the fly front, I kept sewing the fly guard to the front. I used the Ottobre instructions instead of my usual Kwik Sew (too lazy to hunt them) so that threw me off a little bit. The reason the waistband isn't done is that I cut the front pieces wrong for the underlap. I need to go and cut a new one.
I traced all of the Tshirt variations, so I'll try to get another one of those made today. Oh, the possibilities.