In this video I show you how I've made the shape for my DJI Phantom Drone controller on the side of the Nanuk 940.
This was easily done by pressing the cube foam and tearing the part gently
It's strongly suggested to keep the shape square when using the basic cube foams. Trying to do some rounded shapes is harder and won't make a nice finished job.
Squared shapes will keep you products well protected if they fit just tight in the hole.