I’m here to say a big “thank you!” to Rama and all those who contributed to this thread.
We were holding off from updating to 4.7, but on the 14th we decided that 4.7.x contained fixes that would save us time and effort, so went against our original plan and went to it.
First stop was here.
The only issue we’ve ended up having - C++ wise - was the classic “Everything worked first time… ****”.
Blueprint wise, we’ve had some misc issues - the outer is a placeholder warning - that mysteriously fixed themselves.
For anyone experiencing that issue, it seems that running a stand alone version of the game and/or rebuilding the projects solution file sorted it for us.
Though I don’t know why 
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