wow, I like this.
I`m liking the fact that we are starting to get more variety of techno in this forum, it`s about time.

Lovely subtle ambience in the back of this, understated, but full of menace.
Nice little percussion build.
Top end could be brighter, I know you are kind of keeping a very tense and restrained sound in this track, but you could still get a little more brightness into the top end.

I would say as you continue with this track, try to go beyond the surgeon esque, nothing but ambience and a beat, and try to add something musical to it, but it`s early days and so far I`m really really into this.