That's a really cool quad. I never thought about using those double axii antennas for DJI. If you want them to be most effective, make sure you bend them at 90 degrees from each other and roughly 45 degrees from the horizon, depending on average forward flight angle. Based on the photos, you'll have a null zone directly behind the quad, so you'll minimize signal strength as you fly away from yourself. Nice work.

Nice clean build. Thanks for posting.
How do the battery straps fit? i can't really see from your pics.

Unless you fly REALLY fast you should bend those antenna up a bit Otherwhise, you are kind of wasting those expensive antennas xD