diff --git a/bom_replace_alphax_2ch-f.csv b/bom_replace_alphax_2ch-f.csv
index 773dff5..d8ba916 100644
--- a/bom_replace_alphax_2ch-f.csv
+++ b/bom_replace_alphax_2ch-f.csv
@@ -5,8 +5,8 @@ R105,
 # remove jumper resistor connecting BOOT1 with A22 input line, because we use STM32F4
 R131,
 
-# STM32
-U105,"STM32F427ZGT6","LQFP144","C117816"
+# STM32 whatever is cheapest would go, right?
+U105,"STM32F407ZGT7","LQFP144","C19156"
 
 # Alpha2Ch: We don't use SENS1-SENS4 and AUX1-AUX4, so we don't need these OpAmps
 U170,
diff --git a/hellen-one b/hellen-one
index 1a973e1..d7c7d13 160000
--- a/hellen-one
+++ b/hellen-one
@@ -1 +1 @@
-Subproject commit 1a973e15fad8162e4dd4269addef5f7af21c2fd3
+Subproject commit d7c7d13a2545a7a581e211897275572b8eff6313