that whole ar binding thing is a bit goofy. in the body the steroid is metabolized into different compounds, which have different affinities to the ar. a portion of oxymetholone converts to methyl-dht (mestanolone) which has a high ar affinity.
in my experience the whole bill roberts theory on stacking was sorta semantic and never really panned out. according to it,, eq and deca do the same thing and are interchangable. yuh