I proceeded with the RUU.ZIp (of RUU Zip M7_Google Edition_4.4_3.58.1700.5) . (506184 bytes in size)
It was successful as before.. performed the 4.4.2 update.... but STILL no luck with TouchScreen... Have I messed up my device permanently?
or shall attempt to make x.401.xxx work first? and see if that would restore my device fonctionality??