I’ve used moffetts for a few years now. I’ve had them on an artic trailer without any counterbalance, a trailer with concrete railway sleepers in a metal cage on the headboard and now on the back of a wagon and drag with no counter balance. Never felt like it’s close to outta control.
With my current setup when the moffett is off the ring on the bar is at the bottom of the coupling but when it’s on the back the ring is at the top. Another way to put it is I have to wind the rear legs down if I drop the drag with the moffett on the back and it still lifts the front legs off the ground! This doesn’t happen without the moffett. Not lost control…yet!
In case anybody was wondering the weight of a moffett, my M8 nx series is 2.6 tons! They ain’t light considering the size of them.