The sheets are 36 in. I have used this in place of Lite Ply in fuselage sides, hatches, landing gear mounts, servo mounts, etc. and have never had a failure. I use these for firewalls, Gear mounts in bigger planes, and you can double them up to make firewalls for gas engines. For spars, I use 1X4 by 8 ft. Poplar or maple.
Next thing is music wire for landing gear, tail wheels, control surfaces, etc.
You can get this from the inside of an old interspring mattress. You still need CA but you won't use so much of it, Elmers Carpenter's Glue AKA Tightbond which is used on furniture. I use it on wing ribs, sheeting, fuselage skin, etc. It's not instant but you can lay up all your ribs at once and let them set, like before you quit for the day. An item that helps dispense the glue is a all plastic syringe that you can get at your local hobby shop.