Next is the tube installation. Cut the tubes to 55" (I cut them off later in these pictures, it's better to do them first). When cutting the tubes be sure to wrap the cut area in tape to lessen any splintering. After this cut small saw teeth in one end of each tube. These are useful for feeding the tubes through the tightly toleranced former holes. The tubes are captured all the way through the fuse from nose to tail. Once you have the tubes all the way in add some poly glue in the tail section where they contact the side and saddles. You'll add a little more poly glue here when you assemble the other side. Once the poly glue is on spin the tubes back and forth a little to make sure the glue is in good contact between the tube and the saddles. Wetting the balsa and foam slightly before this step will help foam the poly glue a little better and is advisable.

Now you can install the other formers top and bottom of the wing saddles (not the nose yet) . Once this is done glue the tube to the formers where they touch. I just used thin CA here but, if you want and if you work quickly, poly glue or epoxy could be used at the same time you glue the tail saddle in place.

Now check the fit of the motor mounts. If all is well glue them in place to the left side fuse, front wing saddle, and tubes using poly glue or epoxy. Add weight to the motor mounts when gluing to assure proper contact with the fuse sides. while the glue is setting install the remaining formers.



At this point it is a good idea to layout your wire paths and throttle servo location (upper and lower locations precut into the fuse to accommodate different motor carb locations). I did mine later and just melted some of the depron away to get them where I wanted. In some locations it might be good to route away a channel on the outside balsa saddle laminates to make passing the wires through a little easier. Not necessary but I'm sure some of you will find this a better way.
My wires from the tail go under the lower tube and then pass back up past the tubes in the rear wing core out area. This allows you to hide the wires for transparent coverings. You might also be able to route them between the tubes but I haven't, as of yet, tried that.