I did it with 2" tube that the walls were 1/4 inch thick. Since I have air tools and several floor jacks it took between 1.5 to 2 hours, but I also repainted the exposed frame and re-did the brake wire nuts at the same time.
I had a local trailer repair shop cut the tubes and drill the holes. I think the tubes were tubing for hitches. The holes were 8" on center and I think I had them drill the holes 1/16" larger then the bolt size.
My trailer did not have the welds. I did not weld the tubes in place. I just bought some longer grade 8 bolts and reused the nuts. The new bolts were long enough to fit through the frame, the 2" tube, and the axle mounting bracket. I don't think the factory kit instructs you to weld in the new tube.
I will look and see if I can find the instructions, if I have them I will PM you to get you email address to send them to you.
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Art & Joyce
Current camper: Motor Home
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