Mine is not a PSC, but I thought I would show some pics of whqat we did and why.
Instead of SS, you might consider a high grade aluminum. The aluminum will be lighter. It will also give you the ability to go to a large diameter tubing. This is important because you will likely have many wire runs, and the larger tubing makes them easy to do. You will also find the aluminum less expensive.
The negative of the aluminum is it can pit. THat is why I suggest a high grade, coated aluminum where this is minimized (if at all). Mine has been up for over two years and has shown no negative effects.
Just some pics and food for thought....