<font color="blue">I am just wondering if ROPS and seat belt are enough? </font>
Ryan, you've been reading my mind, and I think it's time you moved on to more challenging material (but that's not my main point).
Your comment echoed my thoughts on adding a shoulder restraint system in addition to, or replacing, the existing lap belt. One of my priorities is to construct a FOPS/roll-cage for the tree-bota. I'm obviously always working around trees, and one of my concerns is getting squashed against one if (when?) I tip over. I can think of no better way to stay safe than to be in a roll cage wearing a full restraint system, just like the NASCAR boys. Just the ticket for those embarrassing "endos" down the straightaway, or in my case, down a steep embankment. Sure would be nice to say, "wow, that was quite a ride", instead of merely breathing my last breath. IMHO, my life is worth the 5 seconds it would take to slip into it every time I climb in.
Even without a roll cage, a shoulder restraint might make a lot of sense for anyone using a tractor. It wouldn't be too hard to attach them to the ROPS. While we don't have to worry about the kinds of forces involved in an automobile crash, it might be nice to be held securely in place during a roll-over. I wonder how many tractor operators have been wearing a seatbelt and still been badly injured or killed due to lack of a shoulder restraint? To those who think I'm going overboard, which maybe I am, I assure you that I'm going to draw the line at installing airbags. Although ...... /forums/images/graemlins/laugh.gif
Keep up the good work, and thanks for starting this great thread on such an important topic as our survival.