Originally Posted by tonymorr
The jack on my motorcycle trailer is on a swivel. Straight up and down to jack up and support the trailer. When it's time to go I poot the hitch on the ball then pull on a spring loaded pin and swivel the jack so that it's parallel to the trailer frame - crank to the front, foot to the rear. Cheap and easy - but my jack is on the outside of the single leg that goes to the hitch, not an "A" frame like your trailer.
PM me know if you need/want a photo.