Trim Rev 0 wing skins 4 and 5 to Rev 1 outline

The original wing skins 4 and 5 supplied were all Rev 0. However one of each had tolerance issues, leading to a replacements being sent by TAF. These new skins are Rev 1 and have a slightly different outline along the front edge. Fortunately it is possible and desirable to bring the Rev 0 skins up to date entirely by removal of material. Nothing has been riveted yet. I trimmed the Rev 0 skins to match, with the usual edge smoothing and priming, patching up the existing priming.