yea, your missing the piece that goes in between the noid and casing, fully assembled it should look like this:
the noids are all the same between the worrblade, SF, E1, and E2 frames. theres a couple slight differences like with the karnivor cover (barbs point to the side), but the noid and gasket are all the same.
edit: make sure the gasket is in place properly. its easy for it to be just a hair off center and cause a leak.
make sure the lpr isnt set too high. noid vents at 90psi as a safety measure.
also make sure its not the ram shaft o-ring. if its bad air leaks past and back out the noid, thus looking like the cocking noid is the culprit. pop the front hose off the ram and if air comes out the front of the ram is the shaft oring.