diff --git a/Hardware/Hardware.md b/Hardware/Hardware.md
index 1f13df0..2abe0e2 100644
--- a/Hardware/Hardware.md
+++ b/Hardware/Hardware.md
@@ -28,6 +28,9 @@ important question. microRusEfi unfortunately only supports one VR shaft input m
 
 Frankenso supports up to 2 VR or 2 Hall shaft position sensors. Prometheus supports TBD. Proteus supports TBD.
 
+Q: why stm32?
+
+A: [selecting_open_source_ecu_microcontroller](selecting_open_source_ecu_microcontroller)
 
 
 See also https://rusefi.com/wiki/index.php?title=Hardware:Boards_Comparison
diff --git a/home.md b/home.md
index 6e776d3..71c1999 100644
--- a/home.md
+++ b/home.md
@@ -33,7 +33,7 @@
 
 ## Hardware
 
-[FAQ rusEfi Boards](Hardware_Boards)
+[FAQ rusEfi Boards](Hardware)
 
 ### Frankenso
 #### [Frankenso_MazdaMiataNA6_pnp](Frankenso_MazdaMiataNA6_pnp)
@@ -58,4 +58,6 @@ https://github.com/rusefi/hw_modular
 
 [firmware code automated test coverage](https://rusefi.com/docs/unit_tests_coverage)
 
+[HOWTO_contribute_to_firmware](HOWTO_contribute_to_firmware)
+
 Some GIT help is available inside [misc/git_scripts](https://github.com/rusefi/hw_microRusEfi/tree/master/git_scripts) folder