extruder note

diff --git a/stl/extruder/readme.txt b/stl/extruder/readme.txt
index a315c69..946976d 100644 (file)
--- a/stl/extruder/readme.txt
+++ b/stl/extruder/readme.txt
@@ -5,3 +5,5 @@ The extruder files located here are for the direct-drive extruder that I designe
 
 The parts for the original geared extruder have been moved to stl/alts.
 
+NOTE!  The default direct-drive extruder is expecting you to use 1.75mm filament.  If you are going to use 3mm filament, I recommend building the geared extruder instead.
+