It is always OK to start a new thread even if it is your first visit to the site. The problem with a lot of zombie threads is the information in the earlier part of the thread is long out-of-date and people end up reading through multiple pages to get to the part you want them to read.
I still question the wisdom of building a wide quad because of the safety factor. It is too darn wide for many of the roads I ride. Their new four-seater solar powered with electric assist is 55" wide and over 9 feet long. That takes up a lot of space on the roads and if I were to encounter something that wide coming at me on a bike trail, I doubt we could pass each other coming in the opposite direction. You could never get it between the barriers erected at the ends of many off-road trails. It is just pretty impractical.