Ya know, sometimes you just have to go against the grain. I've been building for 20 years but just been into the foamies for about three. I used a combination of hot glue and foam safe ca for the first few foamies until I read about a guy who was going flying after work only to find a melted mess in his car. I was really hesitant to use the hot glue on the Ultimate but figured E-Flite should know best. Oh well, let's just hope it performs. Just say no to HOT GLUE!!!!