M_Boats: Weights

I need a some weight numbers for the Photo SIte. It was just pointed out to me I have down 40 pounds for the Center Board Weight for the M-23. I think I'd better change that (supposed to be 360 # ). And, while making that correction I would like to add the "net weights" (no motor or provisions) of boat and trailer for the M-15, M-17 and M-23. It doesn't have to be exact, just a close estimate so folks can determine if their trusty rusty car or pickup can or will tow the craft their looking into. I know the weights of the boats, that is published. However I dont know trailer so I can not do combined weights... Someone please help out. Thanks, Bill