Welds look like crap still learning ,but at least its thick metal and didnt have to worry about burning through like on my other tank i made out of 2 propane bottles. That stuff was thin,gotta start working on this bike again someday. Nice bikes you guys love the tanks,arent those the $250 tanks? They sure are nice. Seat was too low for mounting back there plus it messes with the flow of the bike if it were to be mounted back there IMO. This blue bike will be mounted out back though it fits.