Anton (and I) are totally fine with him observing and Anton would even teach him some basics (and direct him to either Bakura or Tony, who are also both developing their knowledge). Just. You know. Be careful with the experimentation, Hiro, sigils done wrong can break a lot of things. If you do want to explodey things while he's inside the Hotel just let me know! The wards would set off if sigils fail explosively, is all. Otherwise they can just not work or simply fizzle as required.

Awesome, done!