I didn't follow any one particular site, it was a combination of many. Pete Ganzel
http://www.pbase.com/pganzel/modification_of__58mm_f12_rokkor and Arkku's sites come to mind. If I remember correctly I used both to fill in the gaps in each others diagrams.
I bought a James Lao chipped adapter M42->¦Á/MAF Focus Confirm Adapter M42-L1 Item# , Lens' Data: 60/1.1 for $42 if I remember correctly.
Using 1/2 stop adjustment setting in the menu brings it up to a starting value of f:/1.2 and matches the stop clicks on the lens.
It is an excellent lens considering it's age, I've one of the older scalloped focusing ring versions and I'm very impressed with it's performance.
I was shooting some high key white Orchids against a window full of overcast sky last weekend, both my Zeiss 85 & 135 gave lots of CA and purple fringing on the edges of the white flowers but the Rokkor was almost flawless.
It's a wonderful lens but a PIA if you want to shoot at any aperture smaller than f/4. You need to open her up, focus and then stop down. Focus confirmation works well though.