Towing Mirrors

I use Milenco at the moment but it doesn't seem to matter how carefully I fit them on each time I still need to adjust them. I have marks on the car door mirrors to also ensure they are in the same place each time. 

Likewise Ben 

Milencos for me on my Tiguan with the 'f' pad.  Solid and steady, no damage but as above nearly always have to adjust them when I fit them.

My Milenco Grand areos need readjusting each time but it's no big deal and they most likely  move when taken off and are stored.

Whats not been mentioned is with the type that cover / attach to the existing mirror glass, you loose the use of that mirror. With my Grand Areos fitted they give an excellent view down the side and behind me to a degree but the cars mirrors, although the view is restricted, allow me to see the caravan wheels when turning, reversing etc.

what would be really great is if you could get door mirrors on a car that were capable of being adjusted outwards. You don't then have the problem of fitting additional mirrors with different focal point, having to readjust them regularly, etc. I have seen vehicles (admittedly large SUV's) in other countries with this type of mirror so why not here.