[woodsman]

While it's true that there's much that can be more easily improved, stiffness IS the foundation with which all else rests. Can 'we' feel it as we enter or exit a corner or flow over a dip or bump? I think so. I test drove a 911 a while back and was surprised at the noticeable improvement- I went over some train tracks at 40 km and swear I could Feel the roof rails! Ever since I've been wondering how to improve the otherwise spectacular Boxster chassis. Those excellent pics don't show 2 major structures along either side of the floor. These are used when jacking the car up and/or for jack stands. Perhaps they could be fortified. Also I think adding an additional bar ( with triangulation) in the lower door openings perhaps 6-8" above the sill would be of the most benefit. Entering and exiting wouldn't suffer much- it's just the install--weld, bolt or bond?