For the racer that likes building their own -3 fuel hoses RBS sells this set of hose crimp dies that allows the racer to be creative and attach dies in a vice, channel locks or how ever you decide. Dies give the ferrule a crush that will withstand high fuel pressure on mechanical fuel injection hoses.
Dies are made from heat treated steel which allow them to be welded to the tool of choice to make your own custom -3 fuel line hose crimper. Included is a knurled fine adjustment stop so you can set the crush on your ferrule.
RBS sells bulk -3 hose, -3 hose ends and ferrules.