I'm going to install myself. They have detailed instruction on their website now. It doesn't look too hard, just a bit fiddly in parts.
I'm sure Southern BM could install for you ole85.
I only know what I've read on their website and in the couple of topics on this forum but I've been familiar with the benifits of meth kits since back in my Evo days. It's not common at all in Australia for some reason.
2012 AW e90 M3 DCT - Daily
2010 AW X6 50i - Tow rig/baby hauler
1991 Nissan 180sx SR20DET - Drift pig