Trying..... to..... ignore........ can't......
It'd be a cool, if frivolous waste of time, to make the sun move in a great circle, occasionally passing behind the moon, for an eclipse, and also have the lunar phases match the sun's position. Of course, we're talking 3D geometry here.
I could post a computer program I have for calculating relative positions of Sun, Moon, & planets in 3D, along with JPL ephemerides, if you like. It uses chebychev polynomials from JPL. It was a pet project of mine way back and uses VB6 language. It hasn't done me any good, just sitting in my archives.