FPV Antenna Hardpoint

was looking for a hardpoint for mounting my fpv antenna in an Eflite Opterra or any foam plane. The idea is to apply hot glue and press into the foam then drill out the center. The center is 6.7mm which is just wide enough for a tight fit for the sma extension from the vtx. then you can screw the nut on the extension and it is hard mounted. I first printed it in PLA and then tried PETG for the first time- the initial design had the teeth breaking off very easily, so I modified the design with .