Nice motor, and nice to see you spending cash in the right areas!
Trying not to sound like a dig/kill joy but are you sure drilling through the compression struts is a good idea? Also the rear antiroll bar setup when under tension will try to twist the rear transverse arms through 360 degrees and load up the rose joints in a way they are not designed for, I would of thought.
Again I dont want to sound like a C**T but I ask as I am trying to build similiar things myself for my S2 and have come across these problems myself.
Other than that I love it mate! Cool as fuck sleeper!