When I was into the engine mount thing I got the RR-Insert but they send me the wrong one (found that later). Anyways, I asked Mazda to change the front mount and put in the insert. They couldn't put the insert in but they changed the mount under warranty
Result: well, it's a lot stiffer. Very little wheel hop, and only on the wet (sometimes). There is slightly more vivration than before though the steering, shifter and the seat. So, Mazda has stiffer mounts. Before that it was wheel hop city!
