What type Wing? I have Hog 32# that has two tubes, I was going to remove tubes, and Sandwich wing between Freedom Plate and the stainless steel bars. I have heard of pinch flats if the wing is not protected from tank sufficiently, so I wonder if your wing has this concern?
Unless you have a long wing and a short tank, the wing is not going to wrap under the tank and get pinched by the tank. I think a pinch flat is more likely to happen from, either, dropping the BPW when it's not mounted to a tank, where the a corner or edge of the plate pinches the bladder against the ground or a bench seat. Or, if you drop your assembled rig into a tank rack that has a lip that sticks up.