Found out the Tamiya esc is dying, the servo plug to the rx is only showing 2.8 volts across red and d black now. Have wired another servo lead to the battery to give a good voltage, the rx is ratted up to 9v according to the spec for the Orange rx. Its l working for now, have ordered some brushed T55 /T80 combi units. Opened the esc up and its not the cable at fault, going to bin it.