Have used foam strips for many years without any problems, but remembering that "Better is the enemy of Good Enough", I tried the silicone/saran wrap approach on my last ARF (a VMAR Texan II, but that is another story). Came out like a dream but for one small detail; the silicone sticks less to the covering than it did to the saran wrap. For the moment the wing is holding the silicone in place. My next try will be to punch some holes in the covering to give the silicone a grip. Hope I don't have to cut away the covering from the saddle because you know that will be the first place the covering will start to lift. I suppose I could go back to the foam tape, but that would be like surrendering in the face of the enemy, wouldn't it?