diff --git a/README.md b/README.md
index d5b701e..19118df 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,7 @@ This script generates 3D-printable, threaded split reels for 16mm and 8mm film.
 This is a parametric model, so download the source code and generate split reels of any capacity for either 16mm or 8mm gauge film.
 
 The design is roughly-compatible with the aluminum reels, but threading plastic onto metal or *vice versa* may break the printed parts.
+These spools **all** have the square
 
 The downloadable models are 120m/400ft reels for 16mm and 8mm film and are designed to hold standard film cores.