Mike,

I am hardly an expert but I have been assembling a VQ P-61 ARC that comes with the setup you describe- a built-up balsa wing with wing tubes and dowels outboard of the booms.

My P-61 has a sleeve that the wing tube fits into glued into holes that are cut into the ribs. The wing has clearance holes for screws drilled through the bottom of the wing and through the sleeve. With the wing assembled and the tube fitted into the sleeve then you drill into the tube through the clearance holes and install sheet metal screws. The screws hold the tube in place within the sleeve. There are four screw holes per tube, two on each side of the joint. The clearance holes through the wing are reinforced- either with hardwood or some sort of insert (I don't remember which). To remove the wing tip you remove the screws from the bottom of the wing and then the tube slides out of the sleeve.

The sleeves are closed on the ends and the tube length is exactly matched so that it can't move back and forth with the wing fitted up snugly.

Being an ARC I don't have exact construction details. But it looks like a conventional design wing (spars/ribs/balsa sheeting) and the ribs are just drilled out for the sleeve which is glued in place. If I were scratch building I would probably use some ply doublers on the ribs at the wing sleeves.

The wood dowels at the front and back are just like those used to attach a removable wing to the fuse. Make sure that there is enough wood to keep the dowels secure.

If you search around you should be able to find matching wing tubes and sleeves for sale. The fit has to be very snug in order to keep the wing solid.

I hope this helps some.

Walt