I was wondering if anyone would know if this Tavistock wall hung pan would be compatible with this Geberit concealed cistern . I know they are from different manufacturers but I was hoping that the fixing and pipe centres would be standard. The fixing bolts appear to be right spacing. The waste and flush pipes look as if they might be adjustable up and down. What other considerations could there be? The Geberit bumph stipulates a low flush pan but I can't find the relevant flush requirements of the pan. Any thoughts appreciated. Thanks