I could give it a try.. do you have them hosted somewhere?
I am currently on 2.420 which i updated myself about 1 year ago which i found online.. now since dahua publishes firmware online (finally) I am trying to load "DH_IPC-HX5(4)XXX-Adreia_Eng_P_Stream3_V2.420.0009.0.R.20151106"
which i...