Hi Gary
This is just an opinion but I would suggest using a much lighter sprung trailer.The picture looks like a "car hauler" meant for carrying a few thousand pounds. Your 700 pound a/c won`t provide enough weight to soften the ride.
If you are going to use this trailer I would at least recommend a shock absorbing arrangement at the tail end.
You may want to look at the setup I use (look on my albums) in order to distribute the load on my Vixen.The are 2 carry through tubes on the rear fuselage that I pin a "saddle"arrangement to.If you mounted this on a suspension assembly I believe it would be easier on the a/c than what I see on your photograph.
It would be a shame to bend it now.
Good luck
Don