Greenworks 24V 22" Cordless Hedge Trimmer

My 24" Black and Decker shot craps on me this week, so I went to buy another one, and discovered it's no longer available. So, I bought this Greenworks 22" unit. Having used it for the first time, I immediately found I could no longer lock it in the on position as I could with the B&D one. Now, in order to keep the blades cutting, I must squeeze the trigger constantly. With the B&D, I could lock the safety release in the "on" position and it would run until I clicked the trigger. With the Greenworks unit, having to constantly squeeze the trigger adds significantly to hand and arm fatigue in a hurry. I also miss the extra couple inches of the B&D, as now, it takes longer to trim the surface area that I have. But for some reason they don't make a 24" either. My B&D blades could be rotated, which this one's cannot. And because I must constantly squeeze the trigger, I can't hold the unit single-handedly by the forward handle instead of the rear, which used to make it much easier to trim sideways using the B&D. Otherwise, it does the job, but if I could have my B&D back, I'd trade any day.