diff --git a/exp_legacy/module/config/vlayer.lua b/exp_legacy/module/config/vlayer.lua
index d80ed827..c2e0761a 100644
--- a/exp_legacy/module/config/vlayer.lua
+++ b/exp_legacy/module/config/vlayer.lua
@@ -35,6 +35,20 @@ return {
         storage_output = 1, -- >0 allows for item teleportation (allowed_items only)
     },
 
+    --- @class Vlayer.ItemProperties
+    --- @field starting_value number
+    --- @field required_area number
+    --- @field production number?
+    --- @field discharge number?
+    --- @field capacity number?
+    --- @field surface_area number?
+    --- @field fuel_value number?
+    --- @field power boolean?
+    --- @field modded boolean? Set when the item is registered from a modded equivalent
+    --- @field base_game_equivalent string?
+    --- @field multiplier number?
+
+    --- @type table<string, Vlayer.ItemProperties>
     allowed_items = { --- @setting allowed_items List of all items allowed in vlayer storage and their properties
         --[[
             Allowed properties:
diff --git a/exp_legacy/module/modules/control/vlayer.lua b/exp_legacy/module/modules/control/vlayer.lua
index 39346063..37718244 100644
--- a/exp_legacy/module/modules/control/vlayer.lua
+++ b/exp_legacy/module/modules/control/vlayer.lua
@@ -14,10 +14,10 @@ local mega = 1000000
 local vlayer = {}
 local vlayer_data = {
     entity_interfaces = {
-        energy = {},
-        circuit = {},
-        storage_input = {},
-        storage_output = {},
+        energy = {}, --- @type LuaEntity[]
+        circuit = {}, --- @type LuaEntity[]
+        storage_input = {}, --- @type LuaEntity[]
+        storage_output = {}, --- @type LuaEntity[]
     },
     properties = {
         total_surface_area = 0,
@@ -582,11 +582,11 @@ local function handle_circuit_interfaces()
         if not interface.valid then
             vlayer_data.entity_interfaces.circuit[index] = nil
         else
-            local circuit_oc = interface.get_or_create_control_behavior()
-            if circuit_oc.sections_count == 0 then
-                circuit_oc.add_section()
+            local control = interface.get_or_create_control_behavior()
+            if control.sections_count == 0 then
+                control.add_section()
             end
-            circuit_oc = circuit_oc.sections[1]
+            local circuit_oc = control.sections[1]
             local signal_index = 1
             local circuit = vlayer.get_circuits()
 
diff --git a/exp_legacy/module/modules/gui/vlayer.lua b/exp_legacy/module/modules/gui/vlayer.lua
index a57f090a..47d1abe1 100644
--- a/exp_legacy/module/modules/gui/vlayer.lua
+++ b/exp_legacy/module/modules/gui/vlayer.lua
@@ -22,9 +22,9 @@ local function aabb_align_expand(aabb)
     }
 end
 
-local vlayer_container
-local vlayer_gui_control_type
-local vlayer_gui_control_list
+local vlayer_container --- @type ExpElement
+local vlayer_gui_control_type --- @type ExpElement
+local vlayer_gui_control_list --- @type ExpElement
 
 local vlayer_control_type_list = {
     [1] = "energy",
@@ -87,7 +87,7 @@ SelectArea:on_selection(function(event)
     local container = Gui.get_left_element(vlayer_container, player)
     local disp = container.frame["vlayer_st_2"].disp.table
     local target = vlayer_control_type_list[disp[vlayer_gui_control_type.name].selected_index]
-    local entities
+    local entities --- @type LuaEntity[]
 
     if config.power_on_space and event.surface and event.surface.platform and target == "energy" then
         if player.force.technologies[config.power_on_space_research.name].level >= config.power_on_space_research.level then