I just got done cutting a fancy hole in a propane tank so my buddy can have a cool looking fireplace without the fire department giving him crap. He's a hard workin' cat struggling to make ends meet. Two small kids and a wife with medical problems make that hard for him. So I talked him out of a pair of these tanks. Can't get them filled since they're not equipped with OPDs and he can't afford the upgrade. Since his propane company rents him new tanks for next to nothing... I imagine he'll get some enjoyment out of it.