diff --git a/e2-estia.i b/e2-estia.i
index 2c7f880..669e572 100644
--- a/e2-estia.i
+++ b/e2-estia.i
@@ -171,7 +171,7 @@ c read file=tallies/bunker_feedthrough_f1.i echo
 c read file=tallies/bunker_wall_f4.i echo
 c read file=tallies/bunker_wall_f5.i echo
 c read file=tallies/pre_selene1_mesh.i
-read file=tallies/e1_e2_f4.i echo
+c read file=tallies/e1_e2_f4.i echo
 c read file=tallies/e1_e2_f5.i echo
 read file=tallies/shutter_f4.i echo
 c read file=tallies/shutter_f5.i echo
@@ -215,7 +215,7 @@ c -------------------------------------------------------
 c dbcn 375642321 j j j j j j j j j j j 15291711
 c stop calculation either at XeY histories, 6.5 days or tally 15 error <0.001
 c nps 39242646 $ works with rssa file from McStas, original tracks 39242646
-stop nps 1e7 CTME 4e5 $f31 0.01
+stop nps 1e8 CTME 4e5 $f31 0.01
 c nps 14e10 $ works with rssa file, value is scaled to source particles
 c write particle tracks
 c ssw 206505 pty=n $ record all neutron tracks crossing outward
diff --git a/geometry/estia_surfaces.i b/geometry/estia_surfaces.i
index f15ac43..74a2e10 100644
--- a/geometry/estia_surfaces.i
+++ b/geometry/estia_surfaces.i
@@ -854,7 +854,7 @@ c opening for shutter
 220306  22 py    -11.25
 220307  22 py     11.25
 c Shutter block outside
-220400  22 px     -1.06
+220400  22 px     -0.96
 220401  22 px      5.3
 220402  22 py    -11.0
 220403  22 py     11.0
diff --git a/tallies/shutter_f4.i b/tallies/shutter_f4.i
index 0a9559f..593c945 100644
--- a/tallies/shutter_f4.i
+++ b/tallies/shutter_f4.i
@@ -16,3 +16,21 @@ e54      1e-10 1.58e-10 2.51e-10 3.98e-10 6.31e-10
          1e+2 1.58e+2 2.51e+2 3.98e+2 6.31e+2
          1e+3 1.58e+3 2.51e+3
 fq54 e f
+c f4 tally sphere within the beam just outside the selene 1/2 separator wall
+fc154     photon flux behind instrument shutter
+f154:p    100707 100710
+e154     1e-10 1.58e-10 2.51e-10 3.98e-10 6.31e-10
+         1e-9 1.58e-9 2.51e-9 3.98e-9 6.31e-9 
+         1e-8 1.58e-8 2.51e-8 3.98e-8 6.31e-8 
+         1e-7 1.58e-7 2.51e-7 3.98e-7 6.31e-7 
+         1e-6 1.58e-6 2.51e-6 3.98e-6 6.31e-6 
+         1e-5 1.58e-5 2.51e-5 3.98e-5 6.31e-5 
+         1e-4 1.58e-4 2.51e-4 3.98e-4 6.31e-4 
+         1e-3 1.58e-3 2.51e-3 3.98e-3 6.31e-3 
+         1e-2 1.58e-2 2.51e-2 3.98e-2 6.31e-2 
+         1e-1 1.58e-1 2.51e-1 3.98e-1 6.31e-1 
+         1e-0   1.58    2.51    3.98    6.31 
+         1e+1 1.58e+1 2.51e+1 3.98e+1 6.31e+1 
+         1e+2 1.58e+2 2.51e+2 3.98e+2 6.31e+2
+         1e+3 1.58e+3 2.51e+3
+fq154 e f