Rich entries for the afternoon that turned the LCXL from a lookup into a channel
strip. Written for a cold reader, because these are the blog/video source material.

The four findings worth reading again months from now:

* A daemon with THREE possible lifecycles, two of which could run at once — two
  processes writing SysEx to one board, fighting over every LED, neither wrong
  enough to look broken.
* `StartLimitIntervalSec=0` in [Service] instead of [Unit]: systemd logs "Unknown
  key ... ignoring" and the default retry limit stays in force. A silent failure one
  section heading away from working.
* 34 "destination already taken" clashes that were entirely PHANTOM — an artefact of
  costing a permutation one move at a time when the corpus is uniformly off by one.
* A measurement that overruled my own design: I proposed eight per-column DJ
  filters; measuring which orbits actually receive gF1/gF2/gF3 showed they are
  per-FAMILY (drums / bass / leads) and consistent across all 13 tracks. Building
  the "better" design would have destroyed a working abstraction.

Also: the physical LCXL faders sat at 0 while the Ardour faders had been raised by
mouse — silent divergence, and the next brush of a fader would have killed the orbit
mid-set. Found in a log, not by ear.