Is there a way to reverse the rotation on a grinder? I have a very old, small 6" grinder. The wheel spins up and away from me. I didn't really think about it until I was viewing Stuart's video on the grinding jig set up and realized his sparks appeared to be going down. Is it even worth trying to do it? I realize I can turn the thing around and use it that way but I'd have to remove the shields and I'd prefer for safety reasons not to do that. Up until a couple of weeks ago I used my sanding machine to sharpen because using the grinder freehand wasn't such a good thing. Then I saw a video on UTube demonstrating a jig for sharpening lathe tools. The fellow was selling the plans for it but I figured it out myself and built my own. It's similar to the Wolverine and works great except for the sparks shooting up in the air or the grit when I dressed the wheel. Thanks for all opinions.