[Porterhouse04]

It depends if you plan on using it for a frame or for some sort of an arm. We were thinking of using extruded alum for our frame because of its ease to bolt stuff to. the bolt heads slide right in for great modularity. This can also be a problem if you wish to remove something from the middle of the piece because you might have to take everything else off inorder to slide it out. I wasnt real clear on what you were asking but i hope this helps, good luck!