Falconman,
I jacked up one side only but put the stabilizer jacks down all around. I used jack stands under the frame just on either side of the wheels on the raised side along with the stabilizer jacks. I also left the trailer hooked to my truck.
Altogether, I used two jack stands, four stabilizers, one 12 ton bottle jack, and one 3 ton floor jack to do the job. After I got the trailer lifted with the bottle jack, and the jack stands under the frame and stabilizers down, I then used the bottle jack and floor jack under the axle plates to raise/lower the axles as needed while working on the install.
Went through the whole procedure a 2nd time for the other side.
Barney
