Riser to use Arri style lightweight bar matte box and accessories on studio camera plate rails.
Standard lightweight 15mm bars have a 60mm spacing, 85mm from the centre of the lens. Studio bars have a 100mm spacing, 118mm from the lens centre and offset by 17.25mm.
Several STL files are included. Female to male riser (an exact rail dimensions, and a slightly looser one for FDM printing), with and without clamps. Plus a female to female riser.. useful as a support for dual bar systems.
The thumbscrew for the clamp version requires a 25mm long M5 screw and nut.
FDM, Cura: printed at 0.2mm layer, 1.2mm walls and 30% infil worked for me..