4) 'Window mount' where I have seen some guys have made a plate that covers up the front corner of the windscreen and allows the mirror to be fitted. (I liked this idea as it might be possible to have a manual adjuster inside the car?)
this is what I did, using only existing window mount holes. After all the body work didn't feel like drilling new holes in the body
used the bullets in aluminum, most of the originals had bullets in chromed steel.