[Excaliber]

As was mentioned earlier, you really should consider adding the 5th submarine belt to a four point. It's not only about safety, it's just logical. You cannot tighten down the shoulder straps enough without pulling up the waist straps, which puts the lower belt in the middle of your stomach. It's uncomfortable and ackward, not to mention incredibly dangerous in an actual collision when you rupture your innards. A typical three point belt would actually provide better protection without serious secondary injury concerns from the belt system.

On another note, some tracks are not allowing a Y type harness, you won't be able to run on those tracks with one.

Frankly, I don't know why they even allow a four point belt of any design... Should be three or five.