Support for 3D model

I have some 200mm long straight rod models that need to be 3D printed in FDM. I need to print at 0, 45, and 90 degrees (to the xy plane). However the support automatically generated by the printer software is not able to sustain the rods at 45 and 90 degrees. Thus I was advised to build a scaffold structure to sustain them while printing. The scaffold has to be attached to the rod models through very thin connections so that I am able to detach the parts by trimming without damaging the rods.