I will be using 6061 T6 alu 15mm thickness and i won't use steel washers like that guy did. I'd rather make some spacers and backplates from alu.

I was just reading through this, as i have a rear sway bar on the way... @Law: Have you made any progress on this? I plan on making the brace like this: http://www.honda-tech.com/showthread.php?t=1636865 A really simple solution, that looks like crap, but will do it's job. It will only cost like 30 ...