Thanks guys. Not sure of the weight, but it is heavy. I used the weights that came with the Pacifics I bashed, so about twice what one of them weights, I would say. I got the cow catcher done last nite. Used the one from the Pacific as a base(cut off the uprights, except for the sides), added a top and middle triangle the size of the bottom shape(also filled it in). I then put in some plastic uprights, filling between with some channel that I had filed a curve into. Screwed right back into the old holes. Came out pretty close.
(http://1stclass.mylargescale.com/jerrybarnes/Challenger%20Kitbash%20Build/ChallCowCtchr.JPG)