I completed the remix of Critical Mass 2 days ago. I managed to work around the detuning problems by not playing mp3s or SoundCloud tracks prior to running EnergyXT, so my MIDI export/inport exploits were probably unnecessary. The remix itself took 33 hours and was not easy, but, in the end, I was able to perform a major reworking of the track and added a new slow, almost ambient section in the middle.
Yesterday I completed the 2013 remix of Wave Goodbye. This was a fairly straightforward relevelling/eq/FerricTDS/mastering jobs and took about 2 hours. I hope to start on the Des Rez remix tomorrow.