Just reading through this string – great back and forth. For anyone who has a snowdog, but doesn’t have the reverse option you can definitely add it. It’s 1-2 hours of work depending on how skilled you are (make sure you have a friend with you). There’s a step by step guide with pictures here: https://www.recreationrevolution.ca/blogs/news/installing-the-reverse-gear-kit-on-a-snowdog