In reply to An Triubhas:
The "strike" actually has two positions it can be placed in - one is about a cm higher than the other. If you're going to be doing a lot of drytooling, having the strike on the lower position is preferable. The viper is well set up for leashless climbing, but a more ergonomic tool (like the fusion, or nomic) is better if you're planning lots of hard mixed climbing. The viper is a great all-around tool though.