This has not, by any measure, been a clean bulk... 10 days just will not be enough time to shred me after this bulk, but 21 will.
Honestly, if you can fast 10 days you can fast 21. After day 5 you're able to just completely dissociate from any desire to eat, especially when every morning you wake up visibly leaner. People who haven't fasted don't really understand that your appetite vanishes after a few days and doesn't really return until you've exhausted nearly all of your fat reserves -- generally about 5-6% bodyfat. Fasting also feels good once you're deep into it. Your mind is razor sharp, all senses are heightened, energy is seemingly boundless, and there is an ever-present feeling of euphoria and power. You feel like you're in a bubble that is your own tiny universe, and all problems seem easily surmountable.
It's also pretty awesome to witness a decade of aging just vanish from your face in less than a month, and that first lift after fasting is always the best one ever.