Feedback for Nick W really!
I found much the same to be true as John V6. Looking at john's pic's I think his leather dash roll looks to be better padded than mine, yes it's rubber underneath so his leather must be better quality! The fit is good in that unloaded it clips on quite well and looks the part too! But weight loaded, not quite so great. It really does sag and the top lifts quite a distance away from the dash top. This coupled with the looseness of the square ball location into the body made for quite a rattle'y old ride for the sat nav.
So, on went the thinking cap and this is how I resolved the issue. I drilled an appropriate hole that would line up with the centre tonneau fastener and then sprang the clip which is most accommodating over the top of it when fitting it to the dash. Absolute resolution, it now fits snug, tight and without movement, result! Then I wanted to take the rattle out of the ball fixing so , wanting to keep the flexibility the mount offers I cut a strip of stiff neoprene to fill the horizontal slot of the body, behind the square locator. it runs from side to side of the main body. and sticks out about 1/16" into the profile which is formed by the circular front radius and when in place the deformed neoprene holds the peg ball more stable!
When ascertaining the position of the hole, fit the mount and slide it up to the tonneau fastener and mark it's centre point onto the side of the mount. Accuracy is paramount here! Transfer this across the mount body and then mark a centre point for drilling. You will need to finish with a 6.5 mm drill but step it up from a few smaller sizes as the plastic material is quite friable to drill although strong in use.
I figured that I couldn't give measurements for the hole centre as no doubt all the tonneau fixing studs will be positioned differently.
For me ,this has transformed the use and function of the mount from something that would have annoyed the hell out of me to something that feels totally designed for purpose. Another plus is that it makes demounting the device from the mount simple too!
