I used to own something similar (older SKB model) to house a different mixer, and liked it in general but did not like the soft cover that it came with. This looks like it has a hard cover for better protection. That's a plus over the one I had. It was also a bit odd to carry around but this model seems to have real handles - mine did not. So they've "fixed" some of the things I did not like so much with mine.
I'm now using a much larger rack on wheels as I'm also housing a power amp along with a 2 space drawer, a power distributor and a shelf for some wireless gear.
I did quite a while ago. I simply removed the knob, dropped in a small chunk of wood from a toothpick into the knob, and put it back on. It raised the know slightly from the guitar body and it engages now without any problem. It's been at least 18 months since I did this and actually forgot that I had done this until I read your post.
