I have had rotator cuff problems because of this job and it is very painfull. this lift paid for itself on the first day.
Having had rotator cuff surgery, I can relate to that. After that, I got my mini skidsteer and a genie lift, to handle the difficult chores.
I too have had shoulder fixed but I still carry and lift heavy stuff. Right now it’s wet heavy plywood. I usually set cabinets that are not one offs so when you’re in 1 to 2 kitchens a day there is just no time or space for that tool. I’m sure when you’re settled in a custom kitchen it’s a nice tool to have with you.
Oh and my line of cabinets do come out laser straight and square is all relative.