The following was sent email to Cateye global service:
I am writing to complain about the H34 bracket. http://www.cateye.com/store/parts.php?cid=2_74 I bought a really brilliant light, and then battled to install the bracket. I latter ordered another smaller light for my wife's bike, this time the bracket went on a bit better. BUT, you can never get it tight enough to stop the light slipping about without using a bit of persuasion - and then you can not get it off again without a lot of effort. The tightening nut turns, but it's really tight now and I cannot move it to over to the other handlebar to make space for my cycle computer. The light is great, but the bracket is below par, I'm ordering a replacement bracket for now - can the engineers please improve this part.
Let us see if they can fix it before next winter....
(update : I got a response from the local and end distributor - I've attached the one here)
Thank you for your e-mail regarding the H-34 Flex Tight Bracket.
Please be assured that we will pass your comments onto the R & D department at Cateye for their consideration in future product development.
Customer Services Manager