The lightning holes were covered with individual rectangles of felt like material. There is a thread of mine showing the constuction of my master pattern. If you search on the venders forum or the in progress forum it is still there somewhere. Or maybe look it up on Greymatterfigures website whose linky is on this website?
The canvas attached to the top of the box that makes up the wheelwell and at the bottom at about the place where the tail gear makes it's 90 degree bend.