This model is a design for a basic stellar interferometer. It requires 4 small elliptical mirrors (40mm minor axis). There are holes for reinforcement rods (ideally carbon or aluminium). This design was the final design of a project I did. This alone is not sufficient for getting sharp interference fringes which can be measured. That requires a linear dispersion corrector. The overall print time is around 30 hours. 

• Made for an 8 inch newtonian
• Neptune 4 max
• 300mm/s
• pla+