Ok I have time now. In short stints at the wheel everything is fine in the seat. But I find that if I'm driving for a long time my legs start to get tingly and I start having to shift my weight around alot. Oh, I'm 5'9" too.

I have found a position that seems to work though, and I haven't had that issue this week. I also adjusted the lumbar support and that may have helped it a bit.