GoPro " selfie " Fixed with a 90 Degree head. Hollow inside with a vertical stiffener, i am hoping it will make it bouyant. just tape over the holes. This design has endless options, skeleton handle, bolt together extensions, bolt on GoPro interface, lanyard options for now i am just playing about with my pre-V2 version to seeing how it handles its working life , with the intention of using it for skiing. I print all my designs out on my Ultimaker 3d printer, so i know the designs work, so i would assume that the high tech shapeways printer will give even better results. All photos are of my own Ultimaker printed versions and will differ slightly in design, due to continual updates as i play about with the design.happy printing.