I have a fixed tongue magic tilt trailer for my 16 ft boat. It fits in the garage with barely any room to spare. I found a swing tounge attachement for 70 dollars. It looks good. I was considering having it welded on instead of bolted but I talked to a trailer guy and he said rust will start on my trailer because it is hot dip galvanized. Has anyone done this conversion. Do you know if the rust will be substantial or can I reduce it with some spray on? I need to do this so any help would be appreciated.