Isn't the X2 a two wheel barrow similar to the PI two wheel space shuttle. ?
How are you stopped over it, you lift it by the handles to push it, so in theory the handles are as high as you want them to be when you lift to push it.
If you are struggling, you may have been better with the four wheel version . I am not sure if they do a conversion kit for it .
I have the PI two wheel., Seat box at the front with footplate extended for better base room, carryall and net bag in front of seatbox, rollers in shuttle bag and holdall across the top from handles to seatbox.
Lift and push, I have no problems ,not far off six foot and don't stoop when pushing it .The wheels at the front can be adjusted for height, not sure about the Map trolley set up. Also the handles can be adjusted for height .