Adding a tank makes the system more air-tool friendly and provides the necessary volume to reseat a tire bead. The choices are unlimited—from buying one to fabricating your own using a variety of materials. Just make sure the tank and the materials you use are rated well over the nominal pressures for your system. Ideally, you should double it: a 150-psi system should use components with a minimum 300-psi burst pressure. For us, options and space were severely limited, so we drilled and tapped the rollcage while crossing our fingers that there weren’t a bunch of pinholes in the welds. It held full pressure for more than two hours, which was good enough for us.