Emergency guy line attachment
If a guy line attachment breaks whilst out on the hill, a good way to make an emergency attachment is to use a coin (2p or 10p is best), push the coin into the fly from the inside surface and grasp the coin from the outside surface. In effect you now have the coin wrapped in flysheet, and can then re-tie on the guyline behind the coin which acts as an anchor. You can use all sorts of other items too, balled up sock, screwed up paper, etc etc. can also come in handy as ektra guy points in v windy conditions.