wing mirror loose

[markuk]

there i was enjoying the sun when my drivers side wing mirror came loose.... didnt know if the thing would fall off so i headed home holding it best i could. A quick look in the steve heath book, and i was at that little grub screw... bingo, it worked but then i realized that as soon as i turned the mirror in the correct position, you couldnt get at the screw at all only when the mirror was upside down!... so how do you do it? somebody out there must know!! regards mark