How to measure head clearance

Just a quick little video I slapped together showing how to measure a engines Head Clearance . Little by little I will get better at making these instructional type videos, I am learning as I go so please be kind with your comments ! I found some cheezy little music but I think I may remove that later... Anyways I hope this video helps a few of you getting your engines setup !
Ideal is between 0.4 mm and 0.5 mm.... a stock OS Speed as you see here is 0.37 mm which is super aggressive, a stock Novarossi is around 0.6 mm , Picco's are usually 0.6 mm, reds are closer to 0.5 mm