After the initial fitment of our medical kit(also swivelling load system), we weigh our machines and add weight in the tail so she is as far rear C of G empty as is allowed We have had to fly some on the limit patients(136kg) regularly and between 6 350's never had a report of forward c of G problems inflight or on the weighing sheet once plotted. The additional weight is either 1kg/5kg units and if memory serves 25kg or something is max so it is not a train smash on MAUW.