I have been flying my Skybolt for over a year and the covering is holding up well with the trim staying put. You have to be careful though with the checkerboard covering on the bottom of the wings. It seems to be fragile with regard to applying heat. When smoothing out wrinkles, use a light heat setting. Mine is flying with an OS 91 Surpass II and 14x7 Graupner prop and it's all the power it needs.