ya we know that but are confused about the holes on the frame and linkage. when u move one do u move the other too. so they match? i would assume so but i dont want to tell him wrong. thanks
No - you dont have to. The 3 shock positions on the frame relate to the progressiveness of the shock while the 4 on the linkage plate (A-D), are for travel and head angle adjustments.
So it'll be one of the one holes closest to the mainframe - just depends on how steep or slack he wants to run the bike at. If you can, take him to a short little downhill section you can session for a bit and have a few runs down on each setting to see which you like best. Or you could find the one you like right away.
protect tom mcdonald at all costs