I just got done checking my brother's arsenal, and his biggest weapon, his CPS 2100, has a problem I've never encountered before. When pumping a filled reservoir, the pump will jerk from 1/4 to 3/4 back on the backstroke. It moves smooth on the outstroke, and smooth both ways with no water in the tank.
Heavy artillery + high ground = an easy battle.
Why else would they call me Leviathan?
"Artillery batteries, prepare to fire. XLs, dual aquastorm. Balloons, quick burst, short range. Battery commanders, FIRE AT WILL!"