diff --git a/site_ansto/instrument/config/hmm/hmm_cylindrical_detector_configuration.tcl b/site_ansto/instrument/config/hmm/hmm_cylindrical_detector_configuration.tcl
index 0528df82..97afe61c 100644
--- a/site_ansto/instrument/config/hmm/hmm_cylindrical_detector_configuration.tcl
+++ b/site_ansto/instrument/config/hmm/hmm_cylindrical_detector_configuration.tcl
@@ -1,8 +1,10 @@
+sicsdatafactory new ::histogram_memory::two_theta_array
 namespace eval histogram_memory {
   ::utility::mkVar detector_radius_mm  Float user radius  true detector true true
   sicslist setatt detector_radius_mm units mm
 
- ##\brief Calculate two_theta array from X bin boundaries
+ ##
+ # @brief Calculate two_theta array from X bin boundaries
  #
  # requires detector_active_width_mm det_radius_mm deg_per_rad
   proc two_theta {args} {
@@ -31,20 +33,24 @@ namespace eval histogram_memory {
         set max_b [OAT_TABLE -get X_MAX]
         set min_b [OAT_TABLE -get X_MIN]
         set scale_factor [expr {$deg_per_radian*($det_width_mm/$det_radius_mm) / ($max_b - $min_b)}]
-        set offset [lindex $arglist 0]
+        set offset [::histogram_memory::detector_posn_degrees]
         return [calc_axis $proc_name $scale_factor $offset [OAT_TABLE -get X_boundaries] $args]
       }
     }
   }
   set script_name ::histogram_memory::two_theta
   publish $script_name user
-  sicslist setatt $script_name privilege internal
+  sicslist setatt $script_name privilege user
   sicslist setatt $script_name kind script
   sicslist setatt $script_name access read_only
   sicslist setatt $script_name dtype floatvarar
   sicslist setatt $script_name dlen 100
   sicslist setatt $script_name klass detector
-  sicslist setatt $script_name mutable false
+  sicslist setatt $script_name control false
+  sicslist setatt $script_name data true
+  sicslist setatt $script_name nxsave true
+  sicslist setatt $script_name mutable true
   sicslist setatt $script_name long_name two_theta
   sicslist setatt $script_name units [::histogram_memory::two_theta -units]
+  unset script_name
 }