In the user guide/instructions, it states that you need (2x) 4mm x 50mm carbon tube. There’s no way that is long enough to go through all the holes in the wing to act as a support. Also, wouldn’t you want a continuous rod to go through both wings and the fuselage for support? This part is not very clear in the guide.
The 50mm carbon tubes are for strengthening the wings and making steady joint to the fuselage (the tubes should penetrate 20mm into the holes on the fuselage).
The fuselage structure is already firm enough to handle the forces on high speed and is tested. Therefore another reason for not making the tube go through the fuselage is for saving them on mishap, we dont want to waste the tubes unnecessarily.
If you get any experience on your coming flight please share with us and we would want to make some upgrade in future.