I am building a 82" Akula type hull (8.50" beam). I plan to use a Reverse RCAB ballast system, taking on 4-6 lbs. of water in a separate chamber that encloses the air bladder. Any sugestions with regard to an air pump or compressor that I can use in conjuction with a pressure tank (10-15 psi.), for the air, will be appreciated. Thank you.