That's...pretty ingenious. I'm going to give the mix another shot later, this time using Drumtracker so I can use a Superior 2 kit.
Edit: Mix B
Converted the kick, snare, and toms to MIDI and brought them into the Superior 2 Metal Foundry library for a more natural sound than the Slate samples. I had also tracked the crashes and ride, but the hihat was a bit trickier than I expected so I used the original overhead track with a high pass.