All the sheet metal is 16 gauge. Tips for bead rolling: Your manual roller is a good start. Have a big burly friend crank your roller while you a guiding the metal. Practice different styles of dies and techniques. Draw out your design. These panels where rolled with off-set dies meaning not a male - female beading die but 2 discs with radius'es one on one side of the other die and one roller pushing the metal to the other elevation leading to the ledges of rolled surfaces. Practice, Practice and more practrice will get you there.