This one's back to three tracks of PureSalem Mendiola. I started this Saturday evening, and it didn't really take any shape until Sunday afternoon with an editing/tracking session. Sparser, slower than recent ones. Some of my right-hand technique emphasized more lower midrange than high frequencies. Not really a plan there; it's how it came out.
Convolution reverb, compression/eq in the stereo out.
Title comes from this interesting wikipedia factoid about the number 501.