I hadn't actually intended to make the move to the DJI O3 system - I have the DJI FPV system, it's really good, I'm not flying as much as I used to, so the extra expense of upgrading seemed needless - I mean, the new stuff is stupidly expensive, and how much better can the Goggles 2 and O3 system be, right? But then my hand was forced by being gifted a set of Goggles 2, I have overly generous friends, and so I 'had to' gather parts and build out a quad.

The SpeedyBee Master 5 frame is a remarkable piece of work. When I think back to the laughable 'frames' we were using back in the early analogue days, this is just amazing - it's so well thought through. The carbon is lovely, of course, and the design is sleek and slick, but it's the little things that make this for me. Like the top plate having a separate part at the front, so it's easy to thread the power lead through, the plastic camera side plates being isolated from the metal frame to help reduce vibration, the stack being entirely isolated - the stack bolts don't touch any carbon, they sit in an injection moulded TPU mount fitted into the frame - the fact there is a gosh darned heat sink sitting in the frame that the O3 Air Unit sits on top of, and that all of the yellow TPU parts came with the frame - I printed almost nothing for this one, there was no need. Very impressive work.

Needless to say, with all these nicely thought through features, and excellent vibration reduction, the thing flies like a dream. Fast, smooth, agile. Wonderful. And of course the O3 system really is All That, and then some. The goggles and video transmission are beyond compare, and the fact the O3 Air Unit will record 4K@60 (or more even) is a game changing aspect - no more top mounted GoPro, saving weight, keeping the lines smooth, and no longer running the risk of destroying a $350 camera - which given how fragile the GoPro so called 'action cameras' have become in recent years, is pretty much guaranteed.

But that was when I discovered The Problem. I switched on the Rocksteady EIS, took the thing out, and all the video from that day was unusable - it was a mass of judders and jumps and strange tics. I went and did my research, and discovered it was a bit of a RTFM situation, and had I have done so, I would already have set my ESC PWM frequency to 48kHz, not the default of 24kHz. I made that change and tried it out, and it was a lot better, but there were still some jumps and tics coming through. So I hit up Thingiverse, and found camera mount side plates (thank you Ricky1661) that I printed in soft TPU.

And then tried again. And this time I would say that we are there. This is looking very nice now.

Hats off to DJI again, this is ridiculously good technology, it works so well. The transmitted video reaching the goggles is almost flawless so far, I am not sure how this is even possible, and the stabilised 4K recorded video is just lovely. This is without a doubt the best FPV quadcopter I own.