So here is a mount for the ultrasonic module HC-SR04 fitting on your spider hex copter. First I wanted to make the mount in front of the copter, but if you are using a gopro, this won't work together. So I decided to build a mount for the back. Using a NAZE32 FC and Baseflight or Cleanflight firmware and you're happy.Just enable "supporting material" to get best printing results. After print, u can pull it on the back withoud any screws. You only need some screws to mount the sonar module to the mount. Alternatively you can fix the sonar module with hot glue...