The 8 inch (20 cm) ones will reach. I just did it on my P3S, but there's not alot of extra cable at the top, which is what I wanted anyway. Ideally I would like 9 or 10 inch, but I couldn't find anyone who made them. As far as the glue, like Jay said it's certainly not hard to hot glue them on. I'm not sure what would happen if they came off while the controller was on. My thinking is that I'd rather have the connector pop off if it gets jarred or falls accidentally instead of ripping the antenna ufl contacts off the board and me having to get a new controller. But if the controller is fried anyway if the connections come off while the controller is powered on, I suppose it doesn't matter much either way.