diff --git a/extras/3dprint/README.md b/extras/3dprint/README.md
index 9668a1b..2714dc3 100644
--- a/extras/3dprint/README.md
+++ b/extras/3dprint/README.md
@@ -8,8 +8,7 @@
 
 ![image](https://dl.dropboxusercontent.com/s/07slhy8pi9ujiri/snes_spacer.png?dl=1)   
 
-#### n64sleeve.stl helps with aligning N64 cartridges if the clone slot is not long/wide enough     
-
+#### n64sleeve.stl helps with aligning N64 cartridges if the clone slot is not long/wide enough (print with one perimeter for the vertical shell and enable thin wall detection in the slicer)     
 ![image](https://dl.dropboxusercontent.com/s/s6jxobazww3sm81/n64sleeve.png?dl=1)   
 
 #### backplate_tabs.stl is the backplate that holds the Arduino