diff --git a/readme.md b/readme.md
index 7dcd3f4..ce870f4 100644
--- a/readme.md
+++ b/readme.md
@@ -260,7 +260,7 @@ slightly less time than the simulation itself. Real elapsed time from start to f
   * ~~Apache Commons CSV library writes entries a row at a time~~ 
     * _Got this working, but at the cost of a profoundly strange bug in graph occupancy filtering. Have reverted the repo until I can figure out what caused that. Given how easily Thingiverse transposes CSV matrices in R, might not even be worth fixing._
 * Re-implement command line arguments, to enable scripting and statistical simulation studies
-* Implement sample plates with random numbers of T cells per well.
+* ~~Implement sample plates with random numbers of T cells per well.~~ DONE
   * Possible BiGpairSEQ advantage over pairSEQ: BiGpairSEQ is resilient to variations in well population sizes on a sample plate; pairSEQ is not.
     * preliminary data suggests that BiGpairSEQ behaves roughly as though the whole plate had whatever the *average* well concentration is, but that's still speculative.
 * Enable GraphML output in addition to serialized object binaries, for data portability