http://boxcar-racing.com/forum/index.php?topic=483.0
Good info there... I am now running some sparco 5-points that are FIA spec... I have my driver side sub floor bolt mounted... The driver seat is installed using BK tall man brackets so there is no more adjustability with that seat. The passenger side GT3 seat however is still on factory rails so I have a Porsche OEM GT3 sub mount bar that has the sub wrap mounted on it. I am using the BK hardware on both lap mounts, but over the winter I plan on going full floor mount on both and getting rid of the BK hardware. I will take some photos for you later this week If I remember.