some friends asked how i cover the wingtips, so here´s a brief explanation and a short video. Works the same with Monokote/ultracote/oracover. Never used other brands and i strongly recommend one of these top brands.Pricey but will last forever and achieve better results. First use the iron to tack seal the LE/TE and center covering, no need to complete seal, just tack to hold the covering. Then with the heat gun you gently lift the covering from the wingtip and blow hot air close to where you hold it until changes colour and you feel that the covering softens, then pull down towards the outer perimeter of the tip, nevermind to straight the wrinkles on the top yet. the goal is to pull it and adhere a smal portion at time. move to the next 2" portion and do it again, sometims you will need to soften an already glued edge to help tightening, you can lift back the covering a few times (make sure you have sanded the balsa with 400 grit sandpaper and completely dust blowed before). go ahead doing small portions until the LE, make sure you pull the covering about 1/4 after the center of the tip, so you can trim it later and have 1/4 overlap. when finished, trim the extra at least 1/4 past the center line. DO NOT tighten the covering yet, proceed with the top side of the wing, and after that only you can use the heat gun to taut the whole wing, starting with the wingtips. hint: do not blow over the seam, instead, point the heat gun from center of wing to tip, otherwise you will release the glue.