You no longer need to use expensive Horus gimbals to upgrade your E. Now you can use the more affordable M9 gimbals to make your flight experience the best it can be. Just install the M9s with the supplied rings and screws and reflash the firmware with the Horus sticks option and you are flying magnetically!
2 M9 Hall Effect Gimbals
2 Spacer rings
8 Gimbal screws
Note: It may be necessary to ream out the mounting holes in the M9 to accommodate the new screws.