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14x4 and 14x5 :)

:) re: MK - well... just about everything is "marginal" with them (and their products), I reckon! ;) I regard eCalc as an extremely useful tool for a] getting into the right ball-park and b] watching how different components alter a given scenario. Absolutely reliable? Of course not - too many...

Couple of problems: - you're using "incl. Drive" in the top line, which means that when you change the battery the AUW is not changing. I subtracted the reported "Drive" weight from your first sheet, yielding a "without Drive" weight of 2614g and entered that in the top line (confirming that...

Better accuracy, less latency, or both?

I would distrust anyone with a financial interest - sounds like they were trying to scare you into paying their price. The clear distinction is between leisure/hobby activity and commercial activity. As soon as you are charging for the flight, or the photographic/video output thereof, it's...

The issue will be whether it can cope with "vibration" rather than just "movement". Most of the lens-based system go crazy with vibration - maybe (hopefully) this one will do better.

I strongly doubt that they are stepper motors - have DJI themselves confirmed this? Steppers can "micro-step" to yield the required resolution but at the expense of torque - so, to keep weight realistic, you need to uses a gearbox... which introduces backlash and kinda defeats the object of...

Very cute - but not "autonomous"... they're controlled by a video tracking system hooked to a mega-computer. Notice the cameras around the top of the "arena". :)

Lifting a Red Epic is certainly possible. You'll need big props, therefore big motors and lots of battery power. But where I think you'll struggle is with the camera gimbal - holding and rotating such a large camera is definitely in the "non-trivial" category ;) - this one seems like the best...

Re: channels - to reinforce the answers you've already received... Yes, you need at least one channel on the Tx to control the pitch of the gimbal (you're unlikely to want to control the roll manually, so you don't need two). Since you need 5 channels from the Tx to control the basic flight...

Hey - sorry - I didn't mean to upset you. And you've jumped to a wrong conclusion: I live in Portugal because I love Portugal (and my wife is Portuguese). But that doesn't mean I have to "love" its government and/or everything that happens here. And I don't really see how you can be offended by...

Good move - launch a mediocre machine and get yourself on the evening news, then actually talk about how there's no flight regulation in Portugal so some ink-pisser can jump on the case. The company seems to be heavily EU funded (par for the course in Portugal). "Made in Porugal" - another...

Hadn't seen that particular servo but "no backlash" - impossible, surely? Any gear system will, by definition have backlash. The dual servo scheme (as you've used yourself) is the only effective control scheme (short of a robotics-style dual pinion compensated system, etc. - too complex for this...

I, too, thought direct drive would be the ideal, but backlash (within the servo itself) kills the results.

I'm still slaving away at designing/prototyping, and confidently waiting for the OP Revolution to be launched. What do you need to achieve to get your CC's back in the air?

Yes - this guy is a serious scientist/engineer and very resourceful. Not sure about this design - looks a bit fragile - but IMHO he's heading down the right general path in terms of optimum isolation/stabilisation. In other words, I can confidently predict that you'll be seeing more of this...

Will that mean 400ft, line-of-sight operation and max 7kg AUW before per-flight authorisation required?

You've hit the nail on the head there, Denny. It's the key to a decent living in any branch of photography these days. Stock footage and stills (with releases)- from an unusual/different perspective.