Cutting was quite easy, with no real difficulties. My Dremel was enough for that, I just had to follow the “tooth lign” to only keep the molding of the teeth.
And to keep them always with me, I 3D printed a nice box !
By the way, I had to remove the last tooth of my upper jaw for two reason: my mold was not good enough on these teeth, and the aligner was too big for my box 🙂