I got the idea from JonE5FPV and his vista mod of the 2.5" massive droner ( https://youtu.be/LEYaoj9k_Oc?si=TaL5-0ObGrE_2Wgx ) . I have yet to see anyone else post such a mod, so I built one of my own and may post that build later. That build went well enough to interest me to try building it with the o3. For both the vista and o3 builds, I didn't have to make any changes to the frame, no part of the vtx touches the frame, and the vtx is mounted securely. This build's AUW is 239.05g, which includes GepRC o3 ND filter (though the photo shows Camera Butter UV), Flywoo nano gps w/compass, Speedybee usb-c module, JHE20B Quad Finder LED Buzzer Beacon w/ Internal Battery, 68g GNB 4s, a 14g skid plate for the battery the 3D print antenna mount and a very long power cable; so yes it could be lighter, as I'm sure other vtx systems would also be without changing the rest of the build as presented. The black zip ties are holding and protecting the gps module. Building and flying these machines is therapeutic for me.