I have a SS 4.60. Found the easiest way to disassemble is to deflate most of the way, then from the front of the boat push the bow up until it is almost vertical. this will open up a gap between the aluminium and wood boards. Stick the blade of an oar into the gap and pry the aluminium board loose. To reassemble, you must get the aluminum bards to lock under the wooden board. Again Ive found the easiest way is to wedge the aluminum boards in as tight as you can, then run a rope under the boat where the boards lock. Using the rope, lift the boat and boards up forming an upside down V. Use an oar blade to get the aluminum boards under the wooden board and then let the boat down and fully inflate.
Go over to
www.rib.net, they have a scan from an Avon manual which gives you basic instructions. Also have good instructions for repairing/gluing hypalon. Good luck