I ran my kitebag on top of the tramp for a while and works really good until you turn the boat over on its side with the spinnaker out. It was really difficuly getting around to the up side of the tramp to recover the spinnaker without fully turtleing the boat. At least with the bag on the under side you can reach the recovery rope whilst preventing the boat from fully turning over. <img src="http://www.catsailor.com/forums/images/graemlins/cool.gif" alt="" />