I've heard of people putting on the inside of the upper horn, that way it grips on to more wood. But you should be fine moving it to the tip of the horn, I think quite a few people here have done it without problems. If you are that worried about it take it to a local luthier. He'll probably do it for a small charge.
true ay, well it would definately be the most comfortable position i think too, maybe there's a way of reinforcing it too. you got any pics?