I have that cheap ebay mount, the finish on it isn't great compared to a k-edge but it does the job just fine. Definitely not worth spending 30 quid more.
I have the K-EDGE mounts (Go Big front and saddle mounts). Bought about 2 years ago and they're top notch. A thousand times better than the shaky Garmin branded ones, but of course they don't come cheap.
Take a punt on the eBay copy. Looks almost identical.
Mine arrived and had it out for a spin last night. Pic and short video below. I have a 100mm fork and thought it was quite sturdy - bit of noise feedback from cables tapping but c'est la vie . Thanks Darkkraken
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http://www.ebay.co.uk/itm/Bike-Motorcyc ... 5d5572d639
Take a punt on the eBay copy. Looks almost identical.
Just did!! Thanks!!
https://www.youtube.com/watch?v=PPLGInK ... e=youtu.be