I cleaned up and pached the one piece of belly pan that came with the trailer and bolted on the leveling jacks
Another issue is that the new axle mounting plates appear to be about a 1/4 inch wider than the frame mounting plates. (I don't believe this is an axle problem I think my frame mounting plates are slightly bent inward). I will have to apply some brute force to bend them outward to get the axles to fit in place. needles to say I gave up for the day in frustration.