Trying this driver for the HEQ5 with V3 hand controller and firmware did not go to the correct target. Parking worked.
I noticed that the time settings returned from the mount showed local time in the UTC field. However, the pointing error was not accounted for by this time error. There was another error somewhere. It seems this driver has not been developed very far. I used the EQMOD driver instead and put the mount's hand controller in PC direct mode.