if you tig weld it and use .090 it will not need to roll beads in the tank you do not want the baffles to hold fuel up for the pick up to draw up? the fuel will move to the back of the tank this is were you want the pick ups the baffles brake a big tank up so the fuel will not fly out of the filler neck and helps slow it down when moving if you over baffle the tank if may not get good fuel supple if you block the pick ups