This is a customization of Jörg Sprave's "Rambone" slingshot design. It's main feature is the addition of a 357 Ruger type grip for the handle and for my purposes I removed the holes and opted for using a set of slanted grooves to hold the elastic in place. Original Design: http://www.theslingshotforum.com/f9/rambone-files-31731/ BTW a slingshot in Afrikaans (South Africa) is called a "Kettie" Printed with normal PLA with a 50% infill and shell setting at 5 seems to be enough to make this slingshot extremely tough and hard to break. You can however print it solid for extra strength.