I have remodelled Opendive VR set http://www.thingiverse.com/thing:96878. Mobile phone is fixed by rubber band. Frame is more stable and rigid. Clips fits much better and are designed for simple "eyelet" on rubber band. I have tested different size of magnifiing glass lens. If u have 25mm ones use lens accessories from original open dive, piece called "uchyt_skla" is gor 50mm lenses and uchyt_skla_37 for 37mm diameter. Nastavec 1 and 2 adds 10, 20mm to frame (if needed for different lens magnification. Im usin 5" smarthphone and it works relativelly well. For 5x lenses use latest (v23)version of frame. V11 is 25mm longer for lenses with lower magnification. RP in name means design is optimised for 3d print.
Pieces should be easilly printed on reprap type printer. Just select parts u need for your open dive project.
Added pieces for 29,8mm diameter glass lenses from DX.com. (uchyt_skla_292.stl).