Cheers mate, Yeah I don't mind throwing my tracks out for free dl, the way I look at it is they're gonna end up being ripped and all over the web anyway, they might as well come directly from me (unless of course I'm sending them to a label)
The bass is meant to sound hollow, its kinda a sound I'm really enjoying right now, and in the deep dubstep scene that's a good sound. I appreciate as a drum and bass man you'd prefer more raspy grittiness to it lol.
Percussion is somewhere I lack experience, I agree totally with that point you made, and it's an area I am focusing a lot of my time and energy into right now....hopefully improvement will start showing soon enough!