(Image credit: Turtle Beach) It's not often a new gaming mouse makes me screw my face up at the sheer thought of using it, but well, here we are. The Turtle Beach Command Series MC7 is an 8K wireless squeaker with a 30K sensor and several features I quite like the look of—but it's also got a 2.25-inch touchscreen wedged next to the left mouse button. And it's giving me the slight ick. Partly, that might be down to the fact that I religiously clean all of my screens, touch or otherwise. The idea of continually running my thumb along a smooth, grease-displaying glass surface is enough to encourage small palpitations, and it's getting worse the more I look at it. For a start, you use your mouse without looking at it. Well, I do anyway. Touchscreens don't traditionally work well when you're not staring directly at them, even if you've trained your muscle memory to remember where the controls are. Still, you can apparently check your CPU temps by looking down at this one. Why .…