Bought the DCF630B drywall gun.. warranty it 5 times constantly makes a high pitch squeal and auto function stays activated until I remove battery.. leaks grease and then was told from Canadian tire they arent meant for professional use and meant for home use.. that I'm misusing it only issue with that is I used it as intended for professional use Much rather the older model but they are discontinued sales in my area n online.. I literally first purchased this April 3rd.. today is May 3rd.. replaced it literally 5 times on one job . I do not recommend this drywall gun to my worst enemy.. will move to Milwaukee or mikita for professional grade equipment.