Page 1, right side half way down to the bottom has everything you need.
Those washers are for fine tuning your pressures. They're included in the count to make 12 but it's 10 curved shims and 2 adjustment shims which are flat washers. Same you'll find in your reactor reg with the HP, 10 curved and 2 flat.
If you need further help and the ultimate sticky doesn't help then contact paintball solutions which is tech support for KEE/Empire.