First,be aware of the FD(Free Draggable),you can cheat...Uuhhmm,the design is nice bit the use of the FD is a bit confusing...Anyway,I did it without cheating but not sure in your way...Thanks for sharing @ED-TREV
Not much to it. Used the fd to push the zapper out, which I'll do at any opportunity, then lift B where he needed to be.