I had the same thought about the block, so I added some of the leftover 3/4 balsa stick behind it with a generous amount of thick ca. I questioned the strength alot. There is only the 2 w1 ribs and mine did not even make it to the le so the only thing that would have held it is the sheeting, ribs and the pins. After the mental image of the wing flying off in a loop I made the decision to fix it. I dont have a pic yet but will take one after I install the fiberglass.