I recommend Renfrew bunch route but happy to go either way. There was little traffic there last night and given we're only half an hour earlier it shouldn't be much worse.
GP Lama uploaded a vid to YouTube not that long ago when he tried to update the firmware on his new giant. Went wrong and everything stopped working. He basically had to disconnect everything and reconnect bit by bit updating the firmware as he went. Solved his problem and may help you...