diff --git a/app_win_2_back.cpp b/app_win_2_back.cpp
index 664d573..e42fc17 100644
--- a/app_win_2_back.cpp
+++ b/app_win_2_back.cpp
@@ -2,6 +2,7 @@
 #include "hello_world.hpp"
 #include <iostream>
 #include <glibmm/miscutils.h>
+#include <gtkmm/switch.h>
 
 namespace gui_to_app {
     AppWin2Back::AppWin2Back() : Gtk::Application("org.billy_adventures.character_sheet", Flags::HANDLES_OPEN) {
@@ -56,6 +57,52 @@ namespace gui_to_app {
             main_window->set_visible(true);
         } else {
             on_quit();
+            return;
+        }
+        sword_switch = app_builder->get_widget<Gtk::Switch>("sword_switch");
+        lance_switch = app_builder->get_widget<Gtk::Switch>("lance_switch");
+        morgen_switch = app_builder->get_widget<Gtk::Switch>("morgenstern_switch");
+        bow_switch = app_builder->get_widget<Gtk::Switch>("arc_switch");
+        chainmail_switch = app_builder->get_widget<Gtk::Switch>("chainmail_switch");
+        cookpot_switch = app_builder->get_widget<Gtk::Switch>("cookingpot_switch");
+        pamphlet_switch = app_builder->get_widget<Gtk::Switch>("pamphlet_tourist_switch");
+        medkit_switch = app_builder->get_widget<Gtk::Switch>("medkit_switch");
+        fourche_switch = app_builder->get_widget<Gtk::Switch>("fourche_switch");
+        dagger_switch = app_builder->get_widget<Gtk::Switch>("dagger_switch");
+        rock_kit_switch = app_builder->get_widget<Gtk::Switch>("rock_kit_switch");
+        sack_switch = app_builder->get_widget<Gtk::Switch>("sack_switch");
+
+        const auto test_result = [this]() -> std::vector<const char *> {
+            const std::array test_ptrs{
+                    std::pair{ "sword_switch", sword_switch == nullptr },
+                    std::pair{ "lance_switch", lance_switch == nullptr },
+                    std::pair{ "morgen_switch", morgen_switch == nullptr },
+                    std::pair{ "bow_switch", bow_switch == nullptr },
+                    std::pair{ "chainmail_switch", chainmail_switch == nullptr },
+                    std::pair{ "cookpot_switch", cookpot_switch == nullptr },
+                    std::pair{ "pamphlet_switch", pamphlet_switch == nullptr },
+                    std::pair{ "medkit_switch", medkit_switch == nullptr },
+                    std::pair{ "fourche_switch", fourche_switch == nullptr },
+                    std::pair{ "dagger_switch", dagger_switch == nullptr },
+                    std::pair{ "rock_kit_switch", rock_kit_switch == nullptr },
+                    std::pair{ "sack_switch", sack_switch == nullptr },
+            };
+            std::vector<const char *> test_result;
+            test_result.reserve(test_ptrs.size());
+            std::for_each(test_ptrs.cbegin(), test_ptrs.cend(), [&test_result](const auto &a) {
+                if (a.second) {
+                    test_result.emplace_back(a.first);
+                }
+            });
+            return test_result;
+        }();
+        if (!test_result.empty()) {
+            std::cerr << "Error occurred, at least one switch is not available:\n";
+            for (const auto result: test_result) {
+                std::cerr << result << '\n';
+            }
+            on_quit();
+            return;
         }
     }
 
diff --git a/app_win_2_back.hpp b/app_win_2_back.hpp
index fbc2d67..4f2d1e2 100644
--- a/app_win_2_back.hpp
+++ b/app_win_2_back.hpp
@@ -8,6 +8,10 @@ namespace learn_gtkmm4 {
     class HelloWorld;
 }
 
+namespace Gtk {
+    class Switch;
+}
+
 namespace gui_to_app {
 
     class AppWin2Back final : public Gtk::Application {
@@ -27,6 +31,20 @@ namespace gui_to_app {
         void on_quit();
 
         learn_gtkmm4::HelloWorld *main_window{ nullptr };
+        Gtk::Switch *sword_switch{ nullptr };
+        Gtk::Switch *lance_switch{ nullptr };
+        Gtk::Switch *morgen_switch{ nullptr };
+        Gtk::Switch *bow_switch{ nullptr };
+
+        Gtk::Switch *chainmail_switch{ nullptr };
+        Gtk::Switch *cookpot_switch{ nullptr };
+        Gtk::Switch *pamphlet_switch{ nullptr };
+        Gtk::Switch *medkit_switch{ nullptr };
+
+        Gtk::Switch *fourche_switch{ nullptr };
+        Gtk::Switch *dagger_switch{ nullptr };
+        Gtk::Switch *rock_kit_switch{ nullptr };
+        Gtk::Switch *sack_switch{ nullptr };
     };
 
 } // gui_to_app