I asked this question over on the Green, as they are 39X crazy over there.... but NO responses.... not a very helpful bunch to an "outsider"....

The Crosman parts diagram for the 392 shows the pivot pin location on the piston yoke below center, and also the main pivot pin location for the linkage at the front of the tube.... I assume that is to insure an "over-center" condition when pumped.... Can somebody tell me how much below the center of the piston and the tube those two pins are?....

Bob