I have this strange desire to build an affordable 6x12 field camera that will use roll film and can be carried in my rucksack without too much grief. It would be used almost entirely to take landscape panoramas. My first thoughts were to buy a 6x12 chinese roll film back and a quality large format lens, value for money is a priority.Is it feasible to make your own ground glass and bellows or is it better to buy ready made? All advice/ contacts/plans most welcome. The Shen Hao HZX4511A with a 6x12 back looks very tempting but its way above what I want to spend.