3d printed secondary mirror spider for TS Optics UNC 8" f/4

This is a bit of a controversial topic, but I 3d printed a secondary mirror spider for my telescope. Used PET-CF as it is resistant to creep, to moisture (dew on the telescope may make it really wet) and dimensionally stable.

Layer height doesn't matter much, I printed inb 0.24mm. The 3d model has voids for 4x M4 nuts, to be inserted during the print, before the voids are closed (see pictures). For the collimation screws, insert other 3 nuts on the hex slots, after the print is completed. It should be very snug on a TS Optics UNC with a 230mm ID tube. The spider was designed with 229.8mm OD. May be a good idea to print slightly smaller so the screws that fix the spider in place also apply some tension on the spider vanes. However it is working fine the way it is, shown by the image of the stars. This was taken with the Starizona Nexus 0.75, so any collimation error would be very visible. Although I can see some tilt, I think it is very minimal. This worked fine for me.