diff --git a/readme.md b/readme.md
index 4908318..b6f2251 100644
--- a/readme.md
+++ b/readme.md
@@ -347,9 +347,9 @@ roughly as though it had a constant well population equal to the plate's average
   * ~~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.
 * ~~Enable GraphML output in addition to serialized object binaries, for data portability~~ DONE
-  * ~~Custom vertex type with attribute for sequence occupancy?~~ ABANDONED
+  * ~~Custom vertex type with attribute for sequence occupancy?~~ DONE
     * Advantage: would eliminate the need to use maps to associate vertices with sequences, which would make the code easier to understand.
-    * Have a branch where this is implemented, but there's a bug that broke matching. Don't currently have time to fix.
+    * ~~Have a branch where this is implemented, but there's a bug that broke matching. Don't currently have time to fix.~~
 * ~~Re-implement command line arguments, to enable scripting and statistical simulation studies~~ DONE
 * Re-implement CDR1 matching method
 * Implement Duan and Su's maximum weight matching algorithm