Step one after the wing is sheeted on both sides is to cut the sheeting away over the landing gear mount area. Then the gear is bolted back onto the mount and the sheeting is cut away as close as possible just to allow the gear to retract in the wing.
Next, the wheel cover portion of the gear door is bolted to the landing gear to determine where the skin should be cut out to clear it. I was lucky enough to get both wheel covers for the main gear - the rest of the gear door assembly for this wing was missing. I'll post pictures of the replacement that I built shortly...
Bob