Years ago when I began to think about how I wanted to build my car I thought I'd put a outside mirror on the driver's door. Although I didn't want to mount it on the door. I use a five panel "wink" mirror and for street use really don't need one on the outside. Well....the first time I did a DE I found out that my helment blocked the view on the left side of the car. Fear of side-swiping someone on the track (no passing until motioned to) I did what I had thought about years ago.
1/8" lexan with a Vitaloni mirror mounted to it in the "wing" glass. 1/8" is all my local glass house had in stock. I had a 1/4" piece already, but it was a bit too wide for the rubber. They said that 3/16" was available, but they would have to order it. I was in a hurry to get it installed as I have a DE this weekend. The 1/8 fit just fine and maybe I'll have to seal it with some liquid butyl/silicone, won't know that until I have it out in the rain.....A good feature is I can change it back to the stock glass in about five minutes. Two phillips screws in the top cap and out it comes and in with the other.....easy....
Feedback welcome.....
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