Thanks for that!
Ok .... If you'll bear with me, I'd like to check that I am now using these graphs correctly.
What then, would be the Max Hover Ceiling OGE given, a weight of 1370lbs, an OAT of 30 degrees C at sea level and a QNH of 1005?
I get 3400ft PA which I convert to 3160ft indicated altitude.
I hope I'm somewhere close.
Thanks in advance
Norvill