Just this min finished doing exactly the same job, but on a 2010 Marin Mount Vision Quad Link
After changing the bearings I could not get my head round the whole design. Basically I was still getting movement (side and lateral) on all the links and shock bushings, as there are clearance gaps between the quad link and the bike frame and also between the shock bushing and frame.
No way did I think you could close these clearance gaps (basically flexing the links and bosses on the frame) without overloading the bearings. I was so concerned about this, I only slightly tightened the M8 nuts which in effect would try to flex and close the gaps between quad links and frame and also the frame and shock bushings. This was obviously incorrect, as I ended up with play as stated above.
I then tightend all the M8 nuts to 16 NM, as Marin specify (no torque wrench, so this was a good guess at best)and all is now good.
I am really suprised that the links and frame bosses flexed enough to close the clearance gaps under this reletavely small amount of torque, but they did, and all now seems good. :o)
Just to confirm what is mentioned before. The shock reducing bushes are gripped on the outside faces, this holds the reducing bushes and alows the shock to turn on the shock bush, as the reducing bushes are wider than the shock eyelet.
Hope this helps.