I have no leg clearance issues, and I thought about the D-shape becoming an issue when i need to cross over my arms (more than 90' steerage).
So screw it... I'm going with a nice round shape... no need to reinvent the wheel (no pun intended)
It's now only between these 2
Momo Competition (IMG:
http://www.autocarparts.com/images/18/241_42.jpg)
Grant Corsa GT (IMG:
http://www.grantproducts.com/images/product-images/lg/1020.jpg)