Kevin Grapes has submitted this tip for an alternate method of clamping fuel lines
Kevin says some builders use wire ties or thin twisted wire to hold their fuel lines. I do things differently. I lay a thin ring of solder on the copper tubing and wipe it down with a cool wet rag to remove the Flux. Cut a piece one size bigger tygon fuel tubing about 1/4" wide and slip it over the fuel tygon tubing to be used. Slide the tygon tubing up and over the solder ring at least 3/8", and slide the retainer ring in place above the solder ring. This type of retention remains constant, doesn't cut into the line, and doesn't slide out if place. Use this especially in the fuel tank on the supply lines to ensure they don't come off. Even better since they don't leave sharp edges like tie straps do.
Note: This is also a good method for securing the fuel line to the needle valve nipple or the pressure line to the muffler nipple.