diff --git a/src/day8/re_frame/trace/subs.cljs b/src/day8/re_frame/trace/subs.cljs
index ec1daf1..b1c7e39 100644
--- a/src/day8/re_frame/trace/subs.cljs
+++ b/src/day8/re_frame/trace/subs.cljs
@@ -2,24 +2,44 @@
   (:require [mranderson047.re-frame.v0v10v2.re-frame.core :as rf]))
 
 (rf/reg-sub
-  :settings/panel-width%
+  :settings/root
   (fn [db _]
-    (get-in db [:settings :panel-width%])))
+    (get db :settings)))
+
+(rf/reg-sub
+  :settings/panel-width%
+  :<- [:settings/root]
+  (fn [settings _]
+    (get settings :panel-width%)))
 
 (rf/reg-sub
   :settings/show-panel?
-  (fn [db _]
-    (get-in db [:settings :show-panel?])))
+  :<- [:settings/root]
+  (fn [settings _]
+    (get settings :show-panel?)))
 
 (rf/reg-sub
   :settings/selected-tab
+  :<- [:settings/root]
+  (fn [settings _]
+    (get settings :selected-tab)))
+
+(rf/reg-sub
+  :app-db/root
   (fn [db _]
-    (get-in db [:settings :selected-tab])))
+    (get db :app-db)))
 
 (rf/reg-sub
   :app-db/paths
-  (fn [db _]
-    (get-in db [:app-db :paths])))
+  :<- [:app-db/root]
+  (fn [app-db-settings _]
+    (get app-db-settings :paths)))
+
+(rf/reg-sub
+  :app-db/search-string
+  :<- [:app-db/root]
+  (fn [app-db-settings _]
+    (get app-db-settings :search-string)))
 
 (rf/reg-sub
   :traces/filter-items