at last left off my sawzall jammed up first issue in whatever 30 years at least I think. I normally have double of all tools in case of a failure only had one sawzall. Looked fast yesterday at a box show and saw basic sawzall 100 approx Heavy dugy 139 approx heavier duty rotating head so in corded three choices. Original will be taken apart when more time and then be the back up.
Any logic in one over the other right now heavy duty would be fine id think though the rotating feature may come in handy at times. I saw one battery one and that would be some freedom.