Let me explain why I said what I said, I am no expert but I have been around racing a while and done alot of research and this is just what I have concluded and would like to pass it on so others can make a decision themselves. I have a roll bar and a fixed back Sparco seat in my track car that I drive to the track and to my shop to work on. It has been proven numerous times in crash testing, 4 point harness are not a reliable form of belt. There is a reason that many organizations outlaw them. A stock 3 point belt is designed to alow you to escape to the side and to slightly give, via the reel, in an impact so that you do not submarine, four points do non of this. As for the road safety crews, with more belt holding you in there is more belts to cut to get you out, although the same can be said on the track so I dont know where that argument comes in. My roll bar was welded and installed in such a way that a full cage can be added at a later date and when discussing belts with the designer he said to only use the 3-point on or off track until the full cage is done. Also most people use bolt in roll bars that have a history of sometimes not providing the best of reliability, combined with the un-knowns of harnesses it was a risk I was not wanting to take. I am sure most people know most of this but just backing my statement.