diff --git a/README.md b/README.md
index 25ad4e6..218948c 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,8 @@ A breakout board for the Pinephone's expansion port, which consists of 6 pogo pi
 
 I will go back and update the silkscreen layer to indicate which I2C pin is which, once I find out myself.
 
+Also the standoff/washer .stl file is for 3d printing; it's used because I left the three holes in the pcb larger than necessary to allow some wiggle room, and the machine screw (which is M1.4 by the way) will slip through it otherwise.
+
 
 
 ![alt text](https://github.com/SMR404/PinephonePogoBreakout/blob/master/comparisonPic.jpg "Comparison with and without breakout board attached")