I really like how this is going so far.
The composition is real good, and the whole thing progresses well. Never gets too repetative. The new solo you put in is a lot nicer and keeps the piece fresh.
I think at 2:50 when the "Knuckles" drums kick in you could do more with it, either toss in some sounds or use another instrument. Also, while I like how the piece begins with the Cave melody, I think you could have faded it out in a different, more creative way.
Anyways it's sounding great as always. Keep up the good work, I can't wait to hear the final version.