I bought a set of front elkas with zero preload set up for hard xc riding/light mx with stock a-arms. I suppose that they will be fine but he told me about a link for the rear that would lower the quad and improve the ratio of the shock action(softer in beggining of stroke, stiffer at end of stroke). I guess it only replaces the twin beam link and not the single beam one. I found out about elkas link after ordering the one from cpm. He said that this setup works better for xc and just a regular revavle with zps for mx. Anyone that has any info it would be appreciated as I kind of have doubts after reading the elka link thread.