Looks like a serious setup you've got there now! Thanks for the writeup! Very good info with the corner weights, its hard to find hard data on the weights of these cars. I'm guessing a manual will be a few kgs lighter since there's no AT plumbing and less complex gearbox.
Definitely needs subframe bushings now, seems like they're all back in stock now. Just drive your car down to Melb to get them fitted