I might be wrong here but, I believe that seat will be questioned at Tech.
It was brought up as a result of a build clinic a while back (Darrin Polzin I believe)
That seat does not have a solid/one piece back/pan but rather a bar that runs from left to right to support the driver's back.
The issue was that this seat does not protect the driver well enough from a rear impact, Bar v.s. Pan
Not nit-picking just trying to help you avoid tech line problems, this may have changed since then.
Darrin can you explain this better?