Just thought to share an interesting hand tool which was apparently used to bore odd shapes rapidly by hand (!) with precision and repeatability : http://makezine.com/2015/08/05/old-tech-drills-any-shaped-hole/?utm_source=MakeNewsletter 20150811&utm_medium=email&utm_term=&utm_content=button&utm_campaign=newsletter I prefer myOX, sorry.
Other world to live in, most likely they had time and less rush for production . Tools like that also make less noise and you put a bit more of your soul into it. Sure, these days no one want's to pay for your soul . -Ronald
You better start growing those guts to get more force on it . I must say you do get quick results with the tool. -Ronald