I read the long post about removing rib attach screws, but the leading edge screws cannot be hammered to loosen them because this just bends the ribs. With the exception of a few around the edge, "loosener-uppers" cannot be applied to anything but the heads. Just curious about how all of you have removed these.

When re-installing the leading edges, what does one do when a screw does not tighten up into the ribs? Is it okay to just move the screws 1/4"-1/2" by drilling new holes? I have noticed that Piper somewhat frequently "missed" the rib and had to drill a new hole, sometimes up to 3 times within 1/4" or so.

What amount of corrosion is "acceptable on leading edge skins? One skin is about 3/4 covered with surface corrosion and the others are less than 1/2 covered. Most of it can be scraped off with little effort, but of course not entirely. Will post pictures later.

Finally, is it possible that a landing light was "cut into" the wing? The cutout in the leading edge skin seems to be quite crooked and the corners appear to be something somewhat "uncharacteristic" for Piper to have done it this way.

Thanks for any advice.