do you focus guys ever fill motor mounts with window weld? its something ive seen in the honda community for a nice compromise between rubber and full poly. also not sure if focus companies make specialized poly inserts which aim to fill the empty voids in the rubber mount with a pre-formed poly insert. same principle as the window weld, just less messy, and reversable.
both seem to stiffen up the mount with not too much NVH introduced to the chassis