I think what he's referring to is the pivot-to-roller-tip c/l distance of the standard BBM HS rocker being longer than ideal, which is the case for a number of aftermarket BBM heads.

IIRC, Todd from Competition Wedge (NY) worked w/ Harland Sharp to come up w/ a shorter version to address this, but don't know what the end result was as far as HS offering them for any particular heads.