RepRap I3 Prusa Infitary (hbi3) filament holder

This is top holder for up to three filament rolls. It's dedicated for I3 Prusa Infitary hbi3 - Chinese brand, with LCD display and curved top frame.
Side stands are fixed both on front panel and side parts of the frame - so the weight of rolls makes printer even more stable. They are also shaped, to fit curved front panel design.

You need to print two (left and right) side stands, two blockers for sides of the horizontal bar. You will also need a 13mm horizontal bar and two 2mm screws. I cho