diff --git a/contraption.lua b/contraption.lua
index 60f60bc..2cc5b32 100755
--- a/contraption.lua
+++ b/contraption.lua
@@ -165,8 +165,8 @@ function contraption.create(region)
 
     -- Change nodes from base nodes to their contraption version.
     for pos_hash, node in pairs(nodes) do
-        local rel_pos = minetest.get_position_from_hash(pos_hash)
-        local abs_pos = vector.add(region.min, rel_pos)
+        local rel_pos = vector.copy(minetest.get_position_from_hash(pos_hash))
+        local abs_pos = region.min + rel_pos
         minetest.set_node(abs_pos, node)
     end
 
@@ -178,11 +178,11 @@ end
 function contraption:on_initialize()
     local above_nodes = {}
     for orig_pos_hash, node in pairs(self.nodes) do
-        local orig_pos = minetest.get_position_from_hash(orig_pos_hash)
+        local orig_pos = vector.copy(minetest.get_position_from_hash(orig_pos_hash))
 
         -- Calculate the nodes above the contraption that it
         -- could potentially pull along with it as it moves.
-        local above_pos = vector.offset(orig_pos, 0, 1, 0)
+        local above_pos = orig_pos:offset(0, 1, 0)
         local above_pos_hash = minetest.hash_node_position(above_pos)
         if not self.nodes[above_pos_hash] then
             -- Non-contraption block above this one. Move items here along.
@@ -234,8 +234,8 @@ function contraption:destroy()
     active_contraptions[self.id] = nil
 
     for pos_hash, node in pairs(self.nodes) do
-        local rel_pos = minetest.get_position_from_hash(pos_hash)
-        local abs_pos = vector.add(self.region.min, rel_pos)
+        local rel_pos = vector.copy(minetest.get_position_from_hash(pos_hash))
+        local abs_pos = self.region.min + rel_pos
         local def = minetest.registered_nodes[node.name]
         minetest.set_node(abs_pos, def.drop_in_place)
     end
@@ -251,7 +251,7 @@ function contraption:push(pusher, dir)
     self.recent_pusher[pusher_name] = 1.0 -- seconds
 
     self.motion = self.motion or vector.zero()
-    self.motion = vector.add(self.motion, dir)
+    self.motion = self.motion + dir
 end
 
 function contraption:update(delta_time)
@@ -329,11 +329,11 @@ function contraption:move(offset)
     end
 
     for old_rel_pos_hash, node in pairs(self.nodes) do
-        local old_rel_pos = minetest.get_position_from_hash(old_rel_pos_hash)
-        local old_abs_pos = vector.add(self.region.min, old_rel_pos)
+        local old_rel_pos = vector.copy(minetest.get_position_from_hash(old_rel_pos_hash))
+        local old_abs_pos = self.region.min + old_rel_pos
 
-        local new_abs_pos = vector.add(old_abs_pos, offset)
-        local new_rel_pos = vector.add(old_rel_pos, offset)
+        local new_abs_pos = old_abs_pos + offset
+        local new_rel_pos = old_rel_pos + offset
         local new_rel_pos_hash = minetest.hash_node_position(new_rel_pos)
 
         -- Node is being moved to this position, no need to clear here.
@@ -390,8 +390,8 @@ function contraption:move(offset)
     -- The `to_push` table contains "lose" nodes that are not directly
     -- pushed by the contraption, and may or may not be pushed.
     for pos_hash, node in pairs(to_push) do
-        local rel_pos = minetest.get_position_from_hash(pos_hash)
-        local forward_rel_pos = vector.add(rel_pos, offset)
+        local rel_pos = vector.copy(minetest.get_position_from_hash(pos_hash))
+        local forward_rel_pos = rel_pos + offset
         local forward_rel_pos_hash = minetest.hash_node_position(forward_rel_pos)
 
         -- If there's a node to push ahead of this one, skip.
@@ -411,7 +411,7 @@ function contraption:move(offset)
         to_set[forward_rel_pos_hash] = node
 
         while true do
-            local backward_rel_pos = vector.add(rel_pos, -offset)
+            local backward_rel_pos = rel_pos - offset
             local backward_rel_pos_hash = minetest.hash_node_position(backward_rel_pos)
             node = to_push[backward_rel_pos_hash]
             if not node then break end
@@ -428,16 +428,16 @@ function contraption:move(offset)
     -- Set nodes that need to be changed.
     -- TODO: Can this use a vector key instead of hash, or an array?
     for pos_hash, node in pairs(to_set) do
-        local rel_pos = minetest.get_position_from_hash(pos_hash)
-        local abs_pos = vector.add(self.region.min, rel_pos)
+        local rel_pos = vector.copy(minetest.get_position_from_hash(pos_hash))
+        local abs_pos = self.region.min + rel_pos
         minetest.set_node(abs_pos, node.node or node)
         if node.meta then minetest.get_meta(abs_pos):from_table(node.meta) end
     end
 
     -- Clear nodes that need to be cleared (to AIR).
     for pos_hash, node in pairs(to_clear) do
-        local rel_pos = minetest.get_position_from_hash(pos_hash)
-        local abs_pos = vector.add(self.region.min, rel_pos)
+        local rel_pos = vector.copy(minetest.get_position_from_hash(pos_hash))
+        local abs_pos = self.region.min + rel_pos
         minetest.set_node(abs_pos, node)
     end