"There were a couple of mission planner update a while back that had mysteriously reversed my pitch controls, the next update fixed their error."

"That is a viable option and can work.
Hell you can even configure it to propel the canoe forward once on the water, that would be kind of neat to see."

"Looks good.
I think the only concern I see right off the bat are the motor mounts. I am not sure if you designed them to break if you crash, They look weak (thin) and possibly weakened with the weight reducing cuts you made.
I guess lift efficiency…"

"Looks Good.
You shed a lot of weight on your plate design (thumbs up). maybe 3mm plates would have been better?
16mm tubes!
This should be a very lightweight heavy lift machine.
Hopefully stiffness is not sacrificed.

Let me know if you are happy…"

"One battery simply is not a good thing for my drone since I placed the GPS in the center (I designed it for 2 batteries anyway), Having 2 batteries means I have more options as to where to place them."

"That looks pretty sexy but you should be designing frames with those design skills not prop guards.
Looks like it weighs more then the frame.
Does it allow enough clean air or does the design degrade propeller efficiency?
it looks great but at what…"

"Yes   Drones or any other dangerous thing needs to be a safe distance away from children.
No    I have safety concerns but I lessen the risks by following the operating tips and guides found on this site and others.
Yes and No  I could create prop…"

"50lbs eh.
I hope your hardware is up to the task to lift 50lbs. U8 motors, 24" props minimum, 12S Lipo's etc
You might find more luck "and thrill" by designing and building your own frame besides there are no multirotor frames that I know of that…"

"There can be several causes of unstable flight.
You need to describe in greater detail what was so unstable in flight.
Was the quad spinning in circles in flight?
Was it wobbling in flight?
Was it uncontrollable?
How much power was available, did it…"