Hi, Thinking about buying a polytunnel, where we are most of the windy weather comes from the west, should i site the tunnel with gable end facing west or should i site it length wise facing west, my thinking is if i go for length wise facing west it will then allow the wind to flow over a curved surface, until we get more sheltered with trees, but if i face it gable end westerdly it will have full sun all day down the length of it, hope that all makes sense.