Its pretty self explanatory but I do want to outline 1 very interesting ability and that is full variable control. The hose clamp holding the handle of the drill is adjustable so if I want just a few RPMs I give it a quarter turn but if I want full power just tighten that clamp all the way. You have twice as much precision then with your finger so your able to have much more control of your RPMs.
You will also need to clamp the entire jig onto a bench or table so a C clamp or vise clamp is also needed.
I also want to figure out a way to adjust the jig so that the battery releases easier. Right now its pretty hard to get it in or out. If you haven’t figured out why I want to remove the battery well that’s because shut the drill down immediately. Otherwise I would need to unscrew the clamp. It’s a safe precaution.
As for the grinder and sander, I am working on an attachment jig that will be a little platform which will allow the work piece to also be a bit stationary. I may be explaining this wrong but every bench grinder has a little stand by each wheel.