Do you have RS7 as per title or RS8 as in the text of the post. And what is the type of BB interface for your cranks? If splined that would be ISIS.
I checked a recently acquired RS7 with ISIS splines: it slips on quite a long way quite easy. When it bottoms on the (self extracting) crank bolt it is over half way and still has "room" between the BB and crankarm.
I cannot compare wit Octalink, never owned any.
SORRY! Yes they are RS7 and are isis.
the bottom bracket supplied is a gussett 68mm x 113mm isis.
but it slips on all the way until it can't go anymore.
so sounds like mine are completley worn then?