You can put the drill in a vice or clamp it to your work space. That way you have 2 hands to hold your unique looking sling shot while working on it, and the drill will stay level. You will be able to put more even pressure while working. I set up this rig for a friend who was just starting out wood working and didnt want to cough out cash, he still uses it today. 3 yrs later.
OK y'all, Here's my first ply w/a piece of teak glued on for a palm swell..........' Tried to get similar dimensions to my much liked min-tarus……….I'm trying to think that I've customized to fit my left hand.....It's a fun project...……….