@pokemonguy
Following up here - the NAM issue was due to a lack of resampling (had no idea that was necessary, but I always run 44100 out of habit). I've added a simple lagrange resampler and A/B'd it against the NAM plugin at 96k and 44.1k, it's not perfect but it's quite close.
Original download link has the updated version.
I'll work on the other DSP issues starting with the tuner tomorrow π