larry , don't use long leeds , don't go over the duty cycle and don't use in cold weather . other than that rent one to try and see if you really can use it for your work to see if it works for you . these were the problems a friend of mine had , he had to use one of our sa 200's to finish a job he had bid on and could not complete with one . they are not my favorite or the people who had it for rent . good luck . willie