These parts are shown in more detail in this video -
Print the VTX mount with the slanted part, front end, down on the print bed. It prints with no supports that way. Trim the fuselage front so the mount slides in with some friction to hold it in place. Carefully poke a hole through the side of the fuselage that aligns with the hole in the side of the mount, this will allow you to press the bind/update button on the VTX later if needed without removing the transmitter from the plane. The transmitter will mount to the printed part using the shorter M2 screws supplied with it.
The exhaust vents fit in the stock cutout at the rear of the fuselage, and allow a bit more airflow than the stock piece. I added a second one in the rear section of the top hatches for even more flow. It's not really needed for cooling but with the large air intake at the front, I was building up a high pressure in the fuselage which affected the barometer on my flight controller, and cause incorrect altitude readings. Adding these exhaust vents solved the issue. Print these upside down.
I use a pan servo that sits in the front cutout, I removed the foam under the servo so the servo sits all the way down on top of the VTX mount. The filler piece included here fills in the cutout around the servo. I trimmed both mounting tabs off my servo. This also prints upside down flat on the bed.
The author marked this model as their own original creation.