Well the forward part probably doesn't weigh more than a pound so that means the 4x35lbf total of roughly 140lbf is more than enough in that department. But then that doesn't really count the drogue pull itself. I guess in a perfect world that should be about zero unless something screwed up so I shouldn't worry too much. Also, if the main goes at apogee I just have to walk farther so it isn't the end of the world. Does the charge sizing sound about right to you? I used the NASSA ejection charge calculator and that is what it gave me for the volume and pin number.