Thanks Spearfish
I'm ready to go now, just deck patches and fresh battery
Ebay used receiver turned out less than "cherished" as advertised. Screen quite scratched, firmware two updates behind the times.
sticking scroll wheel and screwdriver pry marks around the battery compartment cover. Seems as though he did not realise you can charge the battery without removing it.
Very close to short circuiting
I've managed to repair the wires and update the firmware. A bit of tweaking also cured the sticking scroller. So just left with poor cosmetics but working order.
Spektrum seem to think INFACT they say that only the latest firmware update is necessary. WRONG! this failed to update several times but installing the previous update first enabled the latest version. I hope this helps other users