Looks like it's designed for bicycle handlebars. Not sure where you'd be able to mount that on a Blade? Best thing to do is look for one that has a RAM mount grip, then get one of these and mount it in your headstock where it's out of the way and easy to see: The Telferizer Custom Motorcycle RAM mounts for GPS Systems
Quite expensive but a great place to mount it: Bykebitz Motorcycle Accessories Ltd Honda Top Yoke Mount
I picked up a new one of those from ebay a few months back, think I paid around £15 for it!! I've got it mounted on the bike and it all fitted well, but haven't used it as such yet.
I think it was a private seller, i've just looked back though my ebay feedback and found the item but the item number no longer brings up the listing! Oh it was £11 that I paid for it, didn't realise I had such a bargain. To be honest at full price from the link above I would have felt disapointed with what you receive in the kit!
Just double click the home button to reveal open apps on the bottom of the screen. Then scroll all the way to the left; the screen orientation lock is the very last symbol.
Not sure what size is needed, but they do a waterproof version too: MOTORCYCLE STEM FORK MOUNT + HOLDER FOR APPLE IPHONE 4 | eBay