I have not yet posted any original/master class-ed files. A collection of original and MC music files will soon be available at www.danielhertz.com for free download. I made a Master Class (MC) file for Peter Breuninger that he posted, I assume it is ok but have not checked it. It is important to understand that there is a big difference in frequency response between recordings, as mastering systems use speakers that vary +/-12dB in tonal balance. MC is designed so that you can tune the sound for your playback system, not someone else's.
In my own tests including transcription of my 30 ips analog tapes to PCM, MC provides exactly the same benefits as the Audio Palette, and the MC files sound identical to the master, unless we use EQ to improve the sound, in which case they sound better. No recording system is perfect, and there are always compromises with mic placement and issues with acoustics. That is why mastering is so important.