I just went to Michael's and found the birch plywood at the same thickness 1/8" (labeled 3mm), it's a little thicker than the FT stuff, but it's 3 layers of sandwiched ply, I've actually taken the softer outer layers and kept the inner harder layer for control horns on previous builds. I'm making landing gear brackets for my anycopter hex out of them and will see if I keep it full thickness or not. I may also wick some CA if needed for strength as well.