Question: I have a VMAR ARF model. I notice that the cavity for the Wing Spar Joiner is blocked at the wing root end of one wing panel. It appears to be blocked by wood. Can I fix this?

Answer: Yes. The wings on some of the models are produced in one piece and then cut into two halves. What you are seeing is a very thin skin of balsa covering the wing cavity entrance. Use a sharp #11 blade to carefully cut away the thin skin of balsa from the cavity entrance.