Page 1, right side half way down to the bottom has everything you need.
http://www.paintballsolutions.com/pd..._Manual_LR.pdf
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.