Here is a case I made a while back for 65mm quads, it fits the ur65, mobula6, beta65x, beta65 pro, pretty much all 65mm brushless quads.
v1 has a rounded bottom.
v2 has a bottom that is grooved to allow you to stack the lid under the bottom.
There are several height lids, the standard fits most quads but if you swap out for a circular polarized antenna you can print a taller top so it doesn't get squished.
support is needed for the bottom, infill doesn't really matter, I printed mine at 0.2mm layer height
Note: I do not make cases that hold batteries as well as I have too many quads that use the same batteries so I have a separate battery holder for the batteries.