Hokay, even with my fancy-dancy shower curtain splash guard, I was still getting wet. Got sick and tired of it, so I super-sized the concept. I used 3/4" aluminum u-channel, and 3 shower curtain liners from walmart. I went up 48" above the front of the tray.
All 3 sides are covered, and there is a split in the middle, shown in the pictures. I can easily change tools, and even get to the E-stop button. Much quicker and easier to move out of the way. It won't stop any projectiles, but it does stop ALL of the splashing, now. :-) Took about an hour of build, $40 for the u-channel and $30 for the curtains liners.