Thanks that is super helpful and thanks for sharing your video.
I have a few questions from what I have seen in your video and link (excuse my ignorance):
1 - If I purchased a Phantom V1 with pmu for zenmuse and I wanted mini iosd would it be necessary to do your can bus hack?
2 - regarding the P2 shell, why would you want to fit a P2 lipo for £105 when you could buy decent 5000mah lipo to fit for £30?
3 - is there a benefit of me ditching the pmu and fitting the upgrade board instead?
Thanks again,
James
Sorry James I forgot to get back and check this. A lot of good answers and comments from everyone as I'd expect. My answers to this question:
1) No... if you get the PMU v2 the CAN BUS port is on the PMUv2 itself. The PMUv2 pretty much takes over from the main board apart from the actual routing of power to the ESC's
2) Answered by a few and the 'smart battery' option is still subject for debate. The key thing for me is that even with the plastic casing the power to weight ratio of the 5200 is 1.6 .... that is about as good for any lipo I've found on hobby king. I found a 6400mah that is 502g on HK (A Turnigy NANO tech). On paper that looks good but it is power to weight of 1.4 - this means it will likely give about the same flight time as the 5200 but be a lot heavier in the air. Further testing to come on it all!
3) Personally I think there is. Less mess inside, if you do the Sarawuth mod as per those links you get your canbus port and if done right you can shave what we (the people trying this) believe to be about 60-80g over using the PMUv2... that is a whole Hero3's worth of weight. It is also a lot less cluttered inside (especially if using a non stock TX).
Other comments in here are well worth listening to. I for one believe that the new TX on the P1.1.1 and P2 is probably a help on some of the reliability issues. Having said that I had a flyaway crash on a NAZA v2 F450 with my Futaba T8J (almost certainly caused by calibrating my compass in a bad area).
Personally right now I believe the upgraded P1 into a P2 shell leaves you with very few drawbacks and from RC Groups and all the investigating people have done: http://www.rcgroups.com/forums/showthread.php?t=2085480 it has been suggested and tested that the NAZA v2 itself has the limiter inside it that stops stock lipo's being used (seems swapping to a non P2 Nava v2 allowed its use). That is all still subject to testing BUT if proved and if re-flashing the NAZA to non Phantom 2 specs can't be done, then it means Phantom v1 with upgrade board inside actually will give you the most options.