Ok Spock. Has a similar problem with that big Cat I built and managed to fix it by a jerry built rig to add up or down pressure where needed and then sat for a couple of hours with the hair dryer gently warming, letting it cool, warming more and so on. Left in the jug with more heat treatment over a couple of days and the wing was fixed. The wing in question had a twist and a curl on one wing the jug was made up of cups, tins, hammers (for weight) and tissue paper to protect the plastic and I dis also glue in a stiff metal rod to help take out some of the warping.