Looking to upgrade our 2007 LSV and really like the Craz. There seem to be some good deals out there on 2016, 2017 & 2018 years. What's the big difference in model years. I believe the 2019 & newer has the G6 ballast, & they system that allows you to switch surf sides, but can you get an older model to surf as well as a new model with the right weight/ballast? Thanks