Craig,
As much as I like the design and the look I was a bit disappointed why they didn't work out for me.
First off, no dis-respect to Peter & Co. He was most prompt and professional.
1) I have a Tornado GT40. The mirror base mount was a little wider than the A-piller door frame and had to be sanded down a bit to fit and not to look like they were bolted on as an after thought. A body shop did the work for me, as well as painting to match. (The picture you posted above shows an A-piller almost twice as wide as what my Tornado has)
2) While driving, the mirrors vibrate. It seems a bit much weight hanging out so far with a relatively small base mount.
3) Due to the fact I had to sand down the base mount area, the vibration cracked the now thined base mount area. In DRB's defense, if I had not sanded the base mount area I'm sure they would not have cracked.
4) I purchased the non-electric model, the glass mirror fitment within the shell did not allow the mirror enough room to move for correct adjustment therefore rear view vision was not acceptable. Again, in DRB's defense, the mirror came seperate and I was responsible to adhere the mirror on the pivot mechanism in the correct place. I did a couple of trial and error fits but was never able to get a good result. I feel the mirror itself needed to be cut down around the perimeter a 1/4" or so. Then it would have had more adjusting flexibility.
I really do like the appearance of the mirrors. So, maybe in the future I will remount them but they will take a little work to make them functional. The main reason I put them away in a box was the vibration issue. In addition, when or if you ever hit a real hard pot hole that jars the car, the mirrors really shake and shudder.