We just bought a new canoe and it is a 17' beast that weighs in around 75lbs. My 88' grandby has what appears to be factory aluminum racks. I've never actually seen another old fwc with this style of rack with the 1" square tube welded to plates that are screwed into the roof frame with 4 screws each. Does anyone have experience with loading these old things? They are structurally sound and hold my solar panel nicely but i'm a little leery of putting Shamu on the on them. Sorry for the sideways picture, I can't seem to rotate it. Thanks