This is my first Instructable, so please bear with me. Constructive criticism is welcomed!
Sometimes I need to drill a perfectly straight hole in surfaces too large for my little bench-top drill press. So I went about modifying my cheap (~$70-ish) drill press from a "bench tool" to a "hand tool." The mod allows me to make holes at a perfect right-angle to large or mounted surfaces like table-tops, floors, and shelves. It is also reversible, so I can convert it to a regular drill press again without any trouble. Best of all, it was free.