I wanted to build a lightweight 5" racer (4s) using the DJI to see if its a reasonable racing option for MultiGP. Without a battery, this weighs in at 307grams.

I had to switch out the standoffs that came with the TBS Source 2, as it wouldn't fit the stack AND the DJI Air Unit. Pretty sure the one I went to is a 30mm, but I pulled it off the STX225 DIY build kit. There should be a pic showing the gap with the original standoffs, the ones I went to are knurled at the top and bottom and necked back in the middle which seemed to work out well to mount the rubber camera mounts.

After I had the extra vertical space, I 3d printed a platform to add some Ummagrip Lite to it and to the bottom of the top plate.

I had to play around with the orientation of the air unit to make the wiring make sense and to figure out how to mount the antennas, which I ended up just sticking out a hole in the top plate.

Took a crack at PID tuning as there was still some oscillation during max throttle and very aggressive direction reversals. But the stock BetaFlight tube proved best.

This thing screams! With it being so light it handles corners super well and with the high kV motors it has great top end speed too! Its faster than I'm able to fly, thats for sure.

Would love any recommendations about you all would have done different, or things i can change to make it better/faster/lighter... unless your suggestion is to go back to an analog setup to reduce weight in the VTX, because obvipusly...