diff --git a/c_source/pruning/pruneVoids.cpp b/c_source/pruning/pruneVoids.cpp
index a82ea72..a42f3bb 100644
--- a/c_source/pruning/pruneVoids.cpp
+++ b/c_source/pruning/pruneVoids.cpp
@@ -718,9 +718,9 @@ int main(int argc, char **argv) {
  
     if (args.isObservation_flag) {
       voids[iVoid].redshiftInMpc = 
-                        sqrt(pow(voids[iVoid].macrocenter[0] - boxLen[0]/2.,2) + 
-                             pow(voids[iVoid].macrocenter[1] - boxLen[1]/2.,2) + 
-                             pow(voids[iVoid].macrocenter[2] - boxLen[2]/2.,2));
+                       sqrt(pow(voids[iVoid].macrocenter[0] - boxLen[0]/2.,2) + 
+                            pow(voids[iVoid].macrocenter[1] - boxLen[1]/2.,2) + 
+                            pow(voids[iVoid].macrocenter[2] - boxLen[2]/2.,2));
       voids[iVoid].redshiftInMpc = voids[iVoid].redshiftInMpc;
 
 
diff --git a/examples/example_observation/example_observation.py b/examples/example_observation/example_observation.py
index 037e71e..72469d0 100644
--- a/examples/example_observation/example_observation.py
+++ b/examples/example_observation/example_observation.py
@@ -58,12 +58,9 @@ numZobovDivisions = 2
 #   1e-9 (or smaller != 0) -> Do not merge anything
 mergingThreshold = 1e-9
 
-# for observations, when cutting voids at the high-z boundary, what multiple
-#   of the radius to cut
-#   0: all voids with centers less than z_max will be allowed
-#   1: all voids at least 1*radius away from z_max will be allowed
-#   Any other nummber: aall voids at least tolerance*radius will be allowed
-highRedshiftTolerance = 1.0
+# when trimming away voids near the bounaries, what multiple of the radius to
+#   use for safety
+boundaryTolerance = 1.0
 
 # don't change this
 dataSampleList = []
diff --git a/python_source/backend/launchers.py b/python_source/backend/launchers.py
index fc73f7e..da235cc 100644
--- a/python_source/backend/launchers.py
+++ b/python_source/backend/launchers.py
@@ -468,7 +468,7 @@ def launchZobov(sample, binPath, zobovDir=None, logDir=None, continueRun=None,
 def launchPrune(sample, binPath,
                 summaryFile=None, logFile=None, zobovDir=None,
                 continueRun=None, useComoving=False, mergingThreshold=0.2,
-                highRedshiftTolerance=1.0):
+                boundaryTolerance=1.0):
 
   sampleName = sample.fullName
 
@@ -517,7 +517,7 @@ def launchPrune(sample, binPath,
     cmd += " --partAdj=" + zobovDir+"/adj_"+str(sampleName)+".dat"
     cmd += " --extraInfo=" + zobovDir+"/zobov_slice_"+str(sampleName)+\
            ".par"
-    cmd += " --tolerance=" + str(highRedshiftTolerance)
+    cmd += " --tolerance=" + str(boundaryTolerance)
     cmd += " --mockIndex=" + str(mockIndex)
     cmd += " --maxCentralDen=" + str(maxDen)
     cmd += " --zMin=" + str(sample.zRange[0])
diff --git a/python_source/vide_pipeline/__main__.py b/python_source/vide_pipeline/__main__.py
index 65baabe..1b88f7c 100644
--- a/python_source/vide_pipeline/__main__.py
+++ b/python_source/vide_pipeline/__main__.py
@@ -122,7 +122,7 @@ for sample in dataSampleList:
                 logFile=logFile, zobovDir=zobovDir, 
                 useComoving=sample.useComoving, continueRun=continueRun,
                 mergingThreshold=mergingThreshold,
-                highRedshiftTolerance=highRedshiftTolerance)
+                boundaryTolerance=boundaryTolerance)
 
 # -------------------------------------------------------------------------
 if (startCatalogStage <= 4) and (endCatalogStage >= 4):
diff --git a/python_source/vide_pipeline/defaults.py b/python_source/vide_pipeline/defaults.py
index 5e6add3..627b3b1 100644
--- a/python_source/vide_pipeline/defaults.py
+++ b/python_source/vide_pipeline/defaults.py
@@ -143,12 +143,9 @@ numZobovThreads = 2
 #   1e-9 (or smaller != 0) -> Do not merge anything
 mergingThreshold = 1.e-9
 
-# for observations, when cutting voids at the high-z boundary, what multiple
-#   of the radius to cut
-#   0: all voids with centers less than z_max will be allowed
-#   1: all voids at least 1*radius away from z_max will be allowed
-#   Any other nummber: aall voids at least tolerance*radius will be allowed
-highRedshiftTolerance = 1.0
+# when trimming away voids near the bounaries, what multiple of the radius to
+#   use for safety
+boundaryTolerance = 1.0
 
 # simulation information
 numPart = 512*512*512