I'm looking at getting a milwaukee sawzall to use when I do the front end work on the 1984 300DT to cut through the eccentric bolts if they need it. I also need to perform demolition on a gazebo in my back yard; cut up the plywood and 2X4s so it can be hauled off as scrap. Question; would you recommend the 12 amp or 15 amp Milwaukee sawzall for both of these jobs?