diff --git a/README.md b/README.md
index d438c9f..ecb80af 100644
--- a/README.md
+++ b/README.md
@@ -6,3 +6,7 @@ Switch control shield for ADI Pluto
 
 Intended for use with [Charon VNA](https://git.brendanhaines.com/brendanhaines/charon_vna) and [Pluto IO Shield](https://git.brendanhaines.com/brendanhaines/pluto_io_shield) to control external RF switches
 
+## Build notes
+
+- Uses stackup: JLC04161H-7628
+- Fuse deviates from BOM: BSMD0603-001-60V