Forgot to mention: The wing came to me with very poorly-done landing gear cutouts. The circular hole for the wheel on one side even broke through the top of the foam in a small spot.

I simply skinned over this issue. My engineering judgment tells me that the wing is stronger like this than it would have been with the open wells with liners installed. I didn't want to add the weight of expanding foam to fill these voids. You can see the edge of the slot that the previous builder cut to allow for the routing of the air-lines or wires in the picture above. The other slot is covered by the expanding foam repair at the root.