This is difficult lay-up dew to the position of the tank and the control push rod and torque tube. I first prepared all the BID on plastic sheets as described in the manual. I then prepared the BID into a âTâ shaped lay-up on the bench with plastic sheet between the lay-ups. This is then put into the CM in the correct position. The Fuel tank is then slid in from the STBD side. Once in position the Bid is folded onto the tank to end up in the âTâ shape required. Then all held in position and left to Set.