got lucky, ridge metal clears the swamp cooler. the ridge sits lower than i expected. finally done. been screwing 5 hours a day for 5 days. thought id never stop screwing. so all and all ive got 30 hours into doing a 2300 square foot roof, straight gable, up and over. but now ive got a feeling for whats involved. can see where a hip and valley would be more, and winds would really be a problem. but not really that bad to do. took longer than if it were shingles. not as hard, physically, than doing shingles. so i would do another, but think id add a little to the price for the extra time it takes.