Keep us informed, this is the same Dahua PTZ I installed in late summer, and have just replaced my existing Sunba 601-20X with a new Dahua SD6CE445XA-HNR in the last few days. The Sunba, while using the Sony Starvis CMOS has good image quality, but its chief problem for me was connectivity problems and they generally got worse as the outside temp went down. Sunba tries to set a lower price point than others, but usually by cutting corners to save money.
As for some of the other problems I've generally ran across, I have a distinct feeling that something "gets lost in translation" in the product manuals. It would take a very good multilingual Tech Writer to actually get across "what they really mean", vs. what we "take it to mean"....