Just that the more calculations and drawing you do ahead of cutting the parts, the better the result. The math you do will be useful for a lot of other work as well.If you have any recommendations let me know.
Also, drawing in advance gives you a chance to add more features while you are set up and cutting. For example, a pin for a cosine bar to set angles. This is super easy when you know about it prior to cutting parts and will add a ton of value to the fixture.