Ran into a problem while replacing old "DM" ducers and instrmnts. Using newer RayM "LOW-PROFILE" ST60's. There isn't enough clearence for floorboards to be placed bk down. The new ducers stick up too high! Aside from drilling and filling, any ideas? I thought I read somewhere in the aechive where someone else had same issue, but after search, can't find.ThanxGrfg8r