Telescope's Spider's Central Hub

This part is the central hub of a telescope's spider, fixing the secondary mirror to the frame using four flexible metal blades. It holds three tuning screws to precisely position the secondary mirror.

It has to be stiff but also light weight. If possible is should be black to minimize "light pollution" inside the telescope.

l_thumb




EDIT 24/08/2017:
Thanks to Franck Lennon who printed the part!

m
Next step, install it in the telescope.