Unfortunately, I can't answer your question. In the past, several owners have made trailers for their A-C yachts and have written about it here. There may be something that would answer your question somewhere on the board. Go to Google and search:

site: pearsonariel.org (space) your subject (no space after the colon) Your subject would be trailer. Probably get a lot of "I need one" or "I have one to sell," but you should find a few where they discuss building a trailer.