I actually swapped to N163 so I could make my own simple waveforms and forgot to edit my post accordingly, but I put an instrument with verbatim waveforms of VRC6 in it and used it extensively. I also maintained only having 3 additional channels in this respect. Then there's Sunsoft 5B to have cymbal crashes (and marching snare for the fortress intros) because as far as I know 5B is the only expansion chip that can do white noise suitable for cymbals and other such percussion.
The uploaded tracks have stereo and panning and the like because I exported each channel separately to WAV and processed the individual channels in Cubase.
At any rate, thanks for giving it a listen!
The original version of the OST was pretty flawed because of several factors working against me, but those are no longer an issue, so now I feel it's been rectified. I want to put the NSF in a download with it, but I keep getting a vague error that no one seems to know the meaning of.