Smartphone and powerbank support for recumbent bike

This enables to fix my smartphone (xperia Z2) and a power bank to the main tube (longitudinal, diam 60mm) of my recumbent bicycle, to enjoy GPS and other performance meters during loooong trips.
Better printed with ABS.
3 parts are to be glued together.
The articulation is made for a 5mm screw and a wingnut.
Only the smartphone support itself needs (a tiny) support.