10 bar isnt a bad option to start with. I think you will be surprised on how well that mech will work on 10 bar. Easy and cheap parts to get hold of and it will get you going. Get a good flow rate on a 10bar system and i think you will be more than happy with it. We were going to do the 16bar option with chuck but we are happy with how it performs and wont be going to 16bar.

Good luck with the build tho.