Take a 1-1/4" x 6" extension tube. The cap is not needed, but the washer
can be used later.
With the rotary tool cut off the flared end so that it is about 15/16"
Next grind down the threads until they fit snugly into the flared end of
the grip section tube. This should require more grinding than you did on
the base tube threads.
#2 Parts List
Emitter Tube Base
Tube Grip Tube
Pommel Tube Clip
Knob Emitter Assembly
Grip Assembly Pommel