I use a short piece of the hand crank shaft, minus the crank, and a 1/2 inch drill. I took the motor off of the landing gear so I am not turning any of the motor gears or shaft. I put the hand crank shaft into the hole on the side and drill away. It lifts and drops my 10,000lb fiver very quickly.
I use a Harbor Freight drill and so far it has been plenty strong. I do not use it very often though so I cannot predict how many up and down cycles it is good for.
I generally have 120V available to run the drill and the few times I did not, I used the manual crank which was still plenty fast and did not take that much effort either. PS: I am 66 yrs old and do not put much effort into anything if I can help it.