I just bought this stainless steel rack.  It fits perfectly in my Marsala K5921 sink which was installed in 1995.  But, unfortunately, it wobbles some when placed in the sink.  The feet on the rack are all good, but since the Marsala sink dips a bit towards the drain, the right foot
at the top of the rack does not sit flat in the sink.  I wish Kohler would have reinforced the rack in the center with heavier gauge stainless steel wire to prevent the rack from bending slightly with a heavy pot on it.