Mmmm... Not bad
Its decent enough, but in my opinion I beleive v1 was 10x better than this. I have to say I like the way you mixed it with a bit of bass.
Add this on to the end of V1
Add this onto the end of v1 and render it as one track. Post on newgrounds under the name Underground Airways.
for you i will :) but i will have to wait untill tomorrow T_T
Please contact me if you would like to use this in a project. We can discuss the details.