How I Used a Vacuum on my Charcoal Drawing

I had a great opportunity to do a commission recently for an officer in the Navy. Being a Navy brat myself, I was pretty excited to do this! I enlisted my Dad for some expert advice on submarine design. Thank you Dad!  Take a look at the speed drawing video I made, it's my first one so be kind ;)  

I didn't want to move my drawing to shake off the excess charcoal dust that accumulates. It took me hours and days to figure-out/perfect my studio set-up so as I could film from the top-down with decent lighting. That's what necessitated me using a vacuum. I'll just say here that I sucked up the drawing on more than one occasion. Ehh, what are you gonna do? I sure the hell wasn't going to do it a different way, I was already committed!