BLACK+DECKER MATRIX 20V MAX Buffer Kit

I have been using the Matrix system ever sine they started making them and own and use almost all of the attachments. I have a set at both my winter and summer homes along with blowers, weed whackers, reciprocating saws and a pole saw using the 20 volt batteries.I use the matrix units probably longer and harder than they were designed for and have worn out and replaced at least 3 of the drive a units.When it was time to replace another one and I when saw this unit and since I did not have the buffer attachment (and do have extra drill attachments) I ordered one.When it came, the battery was dead and would not charge. The buffer attachment was extremely difficult to take on and off. All my other attachments go on and off easily.Using one of my other batteries I checked the function of the unit. When you start and stop the unit there is a large arc flash in the motor that is significantly greater than of my other matrix power units.With the dead battery, difficult attachment, and large arc, I decided I must have gotten a defective unit and sent it back.I ordered another unit, which arrived with all the exact same issues as the first. I have also sent that one back.I will be ordering a Matrix with the drill attachment next and hoping that they received a bad batch of the buffer units and that this is not an indication of a drop in the quality of the Black & Decker Matrix tools overall.