Aft fuselage statics

If you can get the old tube off without damaging the port or the
fuselage, you can pull a new one on with a piece of steel cable. With
the old tube off, insert a piece of 1/16 stranded steel cable, (a
couple of feet longer than the tube), through the port. Fish the cable
out of the fuselage and thread the tube over it. Once the cable is all
the way through, wrap it around a nail or screw securely. Pull on the
cable at the port, and the tube will be pulled onto the port. You can
then cut off the cable where it was wrapped around the nail and remove
the cable from the tube. A couple of things that will make this easier
are to use a hobby knife to flare the inside edges id the tube
slightly. Warming the tube end slightly will also help. A little
lubricant won't hurt, either.

Enjoy...

Jack Womack