diff --git a/Urumbu_short_z/README.md b/Urumbu_short_z/README.md
index fbf05364b8abe95d0beaaba69a2476d2984a0ebb..1458fb6989e8f98ff1cc3124ef0b2efaef1f018e 100644
--- a/Urumbu_short_z/README.md
+++ b/Urumbu_short_z/README.md
@@ -6,6 +6,6 @@ Below is a short z-axis integrated into the xy machine.  The z axis has about 50
 <img src=./img/xyz_machine.jpg width=40%><br>
 
 
-String up and measure z-axis alone.  First horizontal, with fishing line as belt.  Necessary to adjust bearing position to ease friction on z-travel.  Once that feels good, the plot below is obtained, moving in increments of 32*(1/32) steps eight times forward, then reversing.  Each full step is calculated, using the radius of the capstan, to be 0.31 mm.  Hysteresis is about 0.05 mm.
+String up and measure z-axis alone.  First horizontal, with fishing line as belt.  Necessary to adjust bearing position to ease friction on z-travel.  Once that feels good, the plot below is obtained, moving in increments of 32*(1/32) steps eight times forward, then reversing.  Each full step is calculated, using the radius of the capstan, to be 0.31 mm.  Hysteresis is about 0.05 mm.<br><br>
 
-<img src=./img/z_mar08.svg width=100%><br>
+<img src=./img/z_mar08.svg width=75%><br>