I designed this firewall to work with the FT goblin. For the build, Flitetest used the existing firewall that they have for all the swapable designs. Though it worked well, it required you to install the motor to the firewall then glue to the plane. The only way to remove the motor in the future would be to cut the plane up. I wanted something that allowed for easy access to change the motor, allow for feeding the electronics in from the back and also give some airflow through the motor. I was able to design this firewall that achieved all that as well as used the same amount of material as FT firewall. I laser cut mine but attached it is an STL file that can be printed to get the same design.