diff --git a/compacting-storage.lua b/compacting-storage.lua
index ef99774..f6dde82 100644
--- a/compacting-storage.lua
+++ b/compacting-storage.lua
@@ -108,7 +108,7 @@ function set_production (item_type, produce)
     )
     local periph = string.format("redstone_relay_%d", relay_num)
     -- ON is disable production
-    if produce then print(("Producing %s"):format(item_type))
+    if produce then print(("Producing %s"):format(item_type)) end
     peripheral.call(periph, "setOutput", face, not produce)
 end
 
@@ -163,20 +163,20 @@ end
 
 function filter_clamp (diff, current_dist)
     -- reduce diff numbers to what can be crafted using current resources
-    local new_diff = { nuggets = 0, ingots = 0, blocks = 0 }
     if diff.blocks > 0 then
-        new_diff.blocks = math.min(
-            diff.blocks,
+        diff.blocks = math.min(
+            diff.blocks - (diff.blocks % BLOCK_RATIO),
             math.floor(current_dist.ingots / 9)
         )
     end
     if diff.nuggets > 0 then
-        new_diff.nuggets = math.min(
-            diff.nuggets,
+        diff.nuggets = math.min(
+            diff.nuggets - (diff.nuggets % NUGGET_RATIO),
             current_dist.ingots * 9
         )
     end
-    new_diff.ingots = (new_diff.nuggets / 9) + (new_diff.blocks * 9)
+    diff.ingots = (-diff.nuggets / 9) + (-diff.blocks * 9)
+    return diff
 end
 
 function diff_to_crafts (diff)