This is great. I've traditionally eye-balled it to be 90 min or 3hr cycles which works as a quick hack, but I'll consider this calculator next time. Can I just

This is great. I've traditionally eye-balled it to be 90 min or 3hr cycles which works as a quick hack, but I'll consider this calculator next time. Can I just say, it looks like you have good design instincts, I hope it takes you far.