I just built a new launch pad out of an old steel swivel office chair base. Solid as a rock and looks better than anything that you can buy. I'm using a drill chuck, and can use anything up to a 1/4" rod. It is a cross, + with a tube in the middle, and 4 small tubes one at each of the 4 ends, where the casters used to go. For a super heavy rocket that uses a rod, it can be nailed to the ground with spikes driven through the 4 small holes. I wish I could post a picture of it, but my Photobucket account was just canceled, and I have not yet found another place to hold my pictures. Bob.