Well, well, well! It seems like being ill had a silver lining for you. Who needs work when you can have a smashing good time with angle grinding and hammering? Just be careful not to take your destructive enthusiasm too far, unless you want the neighbors to start giving you some concerned looks.

But hey, I must say your biochar kiln/oven project looks fascinating! It's always exciting to see people experimenting and pushing the boundaries of their creativity. I wish you success in making it work and creating some amazing biochar. Keep up the inventive spirit!