Welding on side supports to the main frame.
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walk around of the trailer frame.
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We finally finished the custom gooseneck build and have took it on one trip without a hitch. This thing is awesome, the guys at mission trailers and Kevin at Advantage RV's out of Watertown SD were great to work with. Since the pics we have added a king bed in the goose and it has 2 full size couch / beds over the axles, and a queen drop down in the rear. Full kicker stereo, TV, DVD, Microwave etc... All the creature comforts needed to live in the woods and have a lot of fun. Bathroom and shower not added but everywhere we go our other guys get a room or there seems to be a outhouse that will work for a few days. Very well built trailer and pulls like a dream and we took it through some conditions last trip. You do have to pay for it but hey you only live once. I'm a gooseneck guy for life.
Are you sure that's your trailer as I'm only seeing tandem axles???? I could have sworn that you said that going to a 30' would require triple axles or are they making yours a 30' tandem???