I am planning to make a hammock for our campervan using two Carbon Fibre tubes that will be fixed to the 'A' and 'B' posts of the vehicle (across the front seats, above the steering wheel). I will have some metal inserts made that will be bonded into the ends which will allow the tubes to be hooked onto brackets mounted on the A and B posts. I will be using canvas as the material to support the (small) occupant. The tubes will be approx. 1200mm (front) and 1400mm (rear) long.