DeeJayEye,
I applaud what you are attempting to do. Who knows maybe you will come up with a simplified carbon fiber or 3D printed replacement frame and make some money at doing it. However, I would like to point out another direction you may want to investigate.
There is a very real convergence going on between the sub 250 gram "CINE FPV" freestyle quads and videography drones like the Spark. Everyone is wondering what will dethrone DJI in the consumer space? IMHO it will be these sub 250 gram hybrids. They are already here like the GEP-CX3 Cygnet (not a recommendation). This is just one example of many that are relatively inexpensive. Even whoop class quads like the Beta85x (85 mm motor post to motor post) from Betafpv is sporting a 1080p/60FPS HD camera that flies almost 70MPH. DJI's answer to this explosion is the Tello (seriously?).
Do any of these hybrids have obstacle avoidance, smart shots, GPS, flow sensors, barometer, or a gimbal? No they don't. But if we are honest with ourselves, we really don't need any of those features once you have become an average pilot IMHO. Even the sacred gimbal is going away with in camera stabilization like what is on the Hero 7. I call it going "back to the future".
I still fly my Spark, Mavic, Phantom ..., but they are seeing a lot less flight time over the past year. I am thoroughly hooked on the sub 250 gram class FPV quads.
Here are a few links for inspiration. The first one is a guy who removed the case around Gopro Session (4K) camera and stuck it on a 75mm brushless whoop that weighs 80g

The second is a Cine FPV video from Johnny FPV who is a fantastic freestyle pilot that now makes money shooting videos with his FPV gear. This is from a quad that is 400 grams but I would challenge an Inspire 2 pilot to get shots like this
80g Cinewhoop
JohnnyFPV