I'm thinking of treating myself to one of these[0], and it looks like I can get one off eBay for roughly half the normal retail price. 1. What's the deal with unlocking the mapping data? Will I be able to use all the mapping that's on the supplied DVD, or only whatever the previous owner's installed? How much does it cost to unlock countries, if that's what I need to do? 2. It looks like the normal mounting kits attach to one of the lever clamps. The 9R has a screen brace, which would probably make that unsuitable, but looks like the perfect place to mount it; is there a suitable mounting system? [0] I'm quite capable of reading a map, but I like gadgets.