diff --git a/dev/pd/readme.md b/dev/pd/readme.md
index b3ded6a..caddec0 100644
--- a/dev/pd/readme.md
+++ b/dev/pd/readme.md
@@ -1,3 +1,14 @@
 # branch=pd
 
 * for source experiments (parameters, etc. to change core gen), and other source updates for PD
+
+### minimize cache/queues/etc. for eFabless
+
+* the parameters were likely not tested much, and may have dependencies, etc.; see which ones can change and still compile/run simple test
+
+
+### test OpenROAD tools
+
+1. attempt unit synthesis and static timing, using blackbox arrays amd estimated wiring for some pdk
+
+