Hi Frog,
Thanks for the photo. I've spent some time studying it and wasn't convinced it was the right set up for me.
I've looked at Zefal and B&M and others and saw this Cateye. It's not handed and can turn through 360' and swivel through an elliptical arc - albeit not a great arc but suffice.
I hedged my bets on drilling through the bar ends and being able to use this mirror upside down - just like the B&M cyclestar for drops - and if it went pear shaped, I would buy a good quality bar end plug.
The arrangement works very well indeed. With my hands in the "normal" position, I can see about 3/4 of the mirror. With a very slight wrist movement, I can see all the mirror. With my hands up on the bar ends, there is absolutely no compromise.
The adjustment on the mirror is such that I have full rear observation, with or without panniers.
I concede that the quality of the mirror isn't that of B&M and perhaps Zefal, but I feel that I am getting a much better set up. From my short test, I didn't notice any real vibration of images in the mirror, it stayed put in the position I fitted it in, and, being on a ball joint, it's a doddle to fold out the way if you wish to lean the bike against a wall. The fixings of the mirror into the HB actually act as a "cushion" or protector for the Ergon bar ends.
I have attached some pix showing the set up. I will not be riding with 2 x mirrors, only merely showing the ease of transfer when I go abroad and have to change my mirror for the odd people who insist on driving on the wrong side of the road. It's a wonder there aren't more accidents over there!!
For £8.40 inc pp for 2 x mirrors, I thought it was worth the experiment. My get out of jail card was being able to fit 2 x bungs in the HB if all else fails. At this moment in time, I'm contented - not quite as contented as when the ex left - but, nevertheless, quite contented and happy.
Ian