Sorry, you’re right. I mixed up the maths in my head.
Although, Photon with its 20-rate might indeed need to be nerfed if/when multiplayer comes.
Still, there are other problems created when firing rates exceed 50% of the frame rate, so for a 20FPS network game the firing limit is closer to 10-rate. There are ways around that, but that’s a discussion for a later date. For now, 15-rate should be ok.