Carf-Models Ultra Flash Instruction Manual page 42

If you install the saddle tanks into an already finished plane, the wiring and tubing might
need to be rearranged, depending on your installation. (see pictures)
Mind the positioning of your vent line so that no fuel drips out when putting the plane together.
Here a recommended sample position behind the wings.
Assemble the brass tubes, kerosene stopper and aluminum tank cap using a kerosene-proof fuel
tube inside the tank to join the parts together (Tygon or equivalent).
To prevent any chance of fuel or air leaks, we highly recommend that you solder the supplied
short brass sleeves over both ends of all the 4mm O.D. brass tubes. Clean both parts first with
'Scotchbrite' or fine sandpaper for good joints.
You can either use a heavy clunk in the tank, or the felt clunk provided in the hardware. If you
are using the tanks for additional fuel, cut off the felt from the clunks to reduce flow restriction.
When the tank is completed wash it out carefully to make sure you remove any small particles
that could get into the fuel pump or turbine fuel system.