I am updating my 14" (355mm) astronomical telescope that I designed and built 4 years ago using 3D printing for some of the parts and decided to use CF20 for the upgrade (250C/70C, 200nm, PVA juice, 1.5mm retraction 0.25mm lift). It is proving to be a not so easy ride as the filament is prone to snot-drops, here is the progress so far with the warts. There are 8 parts to this ring and everyone of them has had a dribble cause a dislocation of the print head, the worst due to the nozzle starting to leak, so it pays to check nozzle tightness on a regular basis! I also had all(!!!) the X carriage rod clamps come loose despite all the commissioning checks and that played havoc with the levelling but quality aside the results so far are mechanically very good and the weight reduction over the aluminium original is excellent. 3 more parts to go but I have run out of filament and fans (no shield and finger trouble detaching a blade!). It definitely paid to have the second nozzle heated to help smooth the errant blobs. For those who spotted my Edge trial, yes it's the same part but Edge was a little heavier and not as stiff. I'll keep this updated.