diff --git a/minislots_engine/engine.lua b/minislots_engine/engine.lua
index cd0c834..160d5bf 100644
--- a/minislots_engine/engine.lua
+++ b/minislots_engine/engine.lua
@@ -551,8 +551,8 @@ function minislots.register_machine(mdef)
 	local tiles = {}
 	local cbox = {}
 
-	if def.machine_shape == "standard" then
-		mesh = "minislots_generic_machine_standard.obj"
+	if def.machine_shape == "upright" then
+		mesh = "minislots_generic_machine_upright.obj"
 		cbox = {
 			type = "fixed",
 			fixed = {
@@ -560,8 +560,8 @@ function minislots.register_machine(mdef)
 				{-0.5,  0.5, -0.1875, 0.5, 1.5, 0.5 },
 			}
 		}
-	elseif def.machine_shape == "big" then
-		mesh = "minislots_generic_model_bigslot.obj"
+	elseif def.machine_shape == "upright_big" then
+		mesh = "minislots_generic_machine_upright_big.obj"
 		cbox = {
 			type = "fixed",
 			fixed = { -1, -0.5, -0.5, 1.5, 3.5, 1.5 }
diff --git a/minislots_engine/models/minislots_generic_machine_standard.obj b/minislots_engine/models/minislots_generic_machine_upright.obj
similarity index 100%
rename from minislots_engine/models/minislots_generic_machine_standard.obj
rename to minislots_engine/models/minislots_generic_machine_upright.obj
diff --git a/minislots_golden7s/init.lua b/minislots_golden7s/init.lua
index f6e4084..a8800f7 100644
--- a/minislots_golden7s/init.lua
+++ b/minislots_golden7s/init.lua
@@ -9,7 +9,7 @@
 minislots.register_machine({
 	name = "golden7s",  -- becomes the node name e.g. "minislots:golden7s"
 	description = "Golden 7's slot machine",
-	machine_shape = "standard",
+	machine_shape = "upright",
 	lines = {           -- reel symbol pay line positions: 0 = center, -1 = top, +1 = bottom
 		{  0,  0,  0 }, -- pay line 1: center symbol on each reel
 		{ -1, -1, -1 }, -- pay line 2: top symbol on each reel
diff --git a/minislots_golden7s_deluxe/init.lua b/minislots_golden7s_deluxe/init.lua
index 450b55c..9ed371e 100644
--- a/minislots_golden7s_deluxe/init.lua
+++ b/minislots_golden7s_deluxe/init.lua
@@ -9,7 +9,7 @@
 minislots.register_machine({
 	name = "golden7s_deluxe",
 	description = "Golden 7's Deluxe slot machine",
-	machine_shape = "standard",
+	machine_shape = "upright",
 	lines = {           -- reel symbol pay line positions: 0 = center, -1 = top, +1 = bottom
 		{  0,  0,  0,  0,  0 }, -- pay line 1: center symbol on each reel
 		{ -1, -1, -1, -1, -1 }, -- 2: top symbol on each reel