You'll need an interior patch to hold the butted joint seam on the BT-48 tube.
Cut a piece of cardstock about 1/2" wide and 1/4" longer than your body tube.
Pre-curve the piece in your palm using a rolling dowel until you get an arc as shown in the inset picture.
I used a thin coat of wood glue spread evenly over the entire piece.
Press in place centered over the joint. Use the dowel to apply pressure over the patch piece.
After it dries, sand the overhang off using a sanding block until the patch is even with the ends of the body tube.
When you are stuck without a proper part -
Using this method, you can make couplers to join segments of body tubes.
To smooth out the joint,
Apply a small line of glue the last 3/8" on both sides.
Wipe off the excess with a fingertip then immediately burnish and roll over the seam with a smooth pen barrel. Pressing the loose fibers into the glue should smooth out the cut.
The ends will be exposed on the finished model.
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