Hi all. Working on 60th set this spring. I have always used simple electric drills to drive the 20lbs of drywall screws that I typically use over the 3-4 week period. It takes a lot of muscle, and now I have severe tendinitis where my biceps meet by elbow. Does anyone have a drill that is easy to drive screws that you can recommend? if its battery powered it needs to be long life. I have some recommend to me hammer-type but not sure how that would work with driving screws.