As for a forum, I use the forums of the open source 3d printer community at reprap.org, but that may not really work for you since the DaVinci isn't open source and unmodified cannot even use unbranded plastic or alter the temperature while printing. I don't even know if you can use a normal slicing program.

I would look for a vendor forum, at least for printer specific problems. 

A ship in port is safe; but that is not what ships are built for.
Sail out to sea and do new things.
-"Amazing Grace" Hopper

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