In case you ever in a pinch for wheel wells here is an idea that I tried and its works very well . Go to your favorite Home store , ex-Home Depo , Lowes ect . Go to the Rain gutter section , take your wheels with you and fine some plastic rain gutters that have the same circumferance (or slightly larger ) for $5.00 one piece will make about 6 wheel wells, you could get more but the folds are non useuable . IN my kits planes I find this material to be very strong and you can attach wing ribs to it. Simply add a balsa, ply or plastic base depending on your needs . I have also used PVC pipe based on how much strenghth I have needed in the area , especially where i am cutting ribs in an ARF