diff --git a/inferium-harvester.lua b/inferium-harvester.lua
index c05b7ac..c4a7d1b 100644
--- a/inferium-harvester.lua
+++ b/inferium-harvester.lua
@@ -1,14 +1,15 @@
 local net = require('libs/net')
 local utils = require('libs/utils')
 local turtleUtils = require('libs/turtle-utils')
-local config = require('config/harvesting')
+local LOCAL_CONFIG = require('config/harvesting')
 
-local VERSION = "2.6.0"
+local VERSION = "2.6.1"
 local INFERIUM_SERVER = 'inferium.com'
 local IDLE_TIME = 2
 local WAIT_ITEM_IDLE_TIME = 5
 local NETWORK_TIMEOUT = 4
-local MIN_FUEL_NEEDED = (100 + config.firstCropZ + config.length) * 2
+local MIN_INITIAL_FUEL_NEEDED = 16
+local ADDITIONAL_FUEL_MARGIN = 100
 local MAX_FERTILIZED_ESSENCE = 32
 local MIN_FREE_SLOTS_BEFORE_COMPACT = 4
 
@@ -47,8 +48,12 @@ local function getIndexedCount(t)
   return res
 end
 
-local function hasEnoughFuel()
-  return turtle.getFuelLevel() >= MIN_FUEL_NEEDED
+local function getMinFuelNeeded(config)
+  return (ADDITIONAL_FUEL_MARGIN + config.firstCropZ + config.length) * 2
+end
+
+local function hasEnoughInitialFuel()
+  return turtle.getFuelLevel() >= MIN_INITIAL_FUEL_NEEDED
 end
 
 local function retrieveChestFuelOrientation()
@@ -144,7 +149,8 @@ local function retrieveHomePositionProcedure()
   turtle.turnLeft()
 end
 
-local function dropAllProcedure()
+-- first parameter is config
+local function dropAllProcedure(_)
   print('> drop all')
   for i=1, 16, 1 do
     local count = turtle.getItemCount(i)
@@ -159,14 +165,16 @@ local function dropAllProcedure()
   end
 end
 
-local function refuelProcedure()
+local function refuelProcedure(config)
   local fuelLevel = turtle.getFuelLevel()
   print('> fuel: ' .. tostring(fuelLevel))
 
-  if fuelLevel < MIN_FUEL_NEEDED then
-    print('> refuel needed (minimum is ' .. MIN_FUEL_NEEDED .. ')')
+  local minFuelNeeded = getMinFuelNeeded(config)
 
-    local refuelOk, refuelErr = turtleUtils.refuelWithBuffer('bottom', 'front', MIN_FUEL_NEEDED, IDLE_TIME)
+  if fuelLevel < minFuelNeeded then
+    print('> refuel needed (minimum is ' .. minFuelNeeded .. ')')
+
+    local refuelOk, refuelErr = turtleUtils.refuelWithBuffer('bottom', 'front', minFuelNeeded, IDLE_TIME)
 
     if not refuelOk then
       error('Cannot refuel the turtle: "' .. refuelErr .. '"')
@@ -176,7 +184,7 @@ local function refuelProcedure()
   end
 end
 
-local function goToHarvestPoint()
+local function goToHarvestPoint(config)
   turtle.turnLeft()
 
   for i=1, config.firstCropZ, 1 do
@@ -184,7 +192,7 @@ local function goToHarvestPoint()
   end
 end
 
-local function goBackToHome()
+local function goBackToHome(config)
   for i=1, config.firstCropZ, 1 do
     turtle.forward()
   end
@@ -204,7 +212,7 @@ local function applyFertilizedEssenceIfAny()
   end
 end
 
-local function harvestDown(index)
+local function harvestDown(index, config)
   if config.fertilizedBoost then
     applyFertilizedEssenceIfAny()
   end
@@ -242,13 +250,13 @@ local function forward()
   end
 end
 
-local function harvestProcedure()
-  goToHarvestPoint()
+local function harvestProcedure(config)
+  goToHarvestPoint(config)
 
   term.write('> harvest on ' .. tostring(config.length) .. ' blocks ')
   local nbHarvested = 0
   for i=1, config.length, 1 do
-    if harvestDown(i) then
+    if harvestDown(i, config) then
       nbHarvested = nbHarvested + 1
       term.write('.')
     else
@@ -272,11 +280,11 @@ local function harvestProcedure()
     end
   end
 
-  goBackToHome()
+  goBackToHome(config)
 end
 
-local function retrieveLocalPlan()
-  goToHarvestPoint()
+local function retrieveLocalPlan(config)
+  goToHarvestPoint(config)
 
   print('> retrieve the local plan')
   localPlan = {}
@@ -300,7 +308,7 @@ local function retrieveLocalPlan()
     end
   end
 
-  goBackToHome()
+  goBackToHome(config)
 end
 
 local function fetchRemotePlan()
@@ -314,10 +322,16 @@ local function fetchRemotePlan()
     if replyMessage and replyMessage.payload then
       previouslyFetchedRemotePlan = replyMessage.payload
       print('> plan fetched')
-      return replyMessage.payload
+      local payload = replyMessage.payload
+      if not payload then
+        error('cannot fetch the remote plan')
+      end
+
+      return payload
     elseif previouslyFetchedRemotePlan then
       print('> failed to fetch: ' .. tostring(errMessage))
       print('> use the previous recorded remote plan instead')
+
       return previouslyFetchedRemotePlan
     elseif not replyMessage and errMessage then
       if lastErrMessage ~= errMessage then
@@ -332,8 +346,8 @@ local function fetchRemotePlan()
   end
 end
 
-local function removeSeeds(seeds)
-  goToHarvestPoint()
+local function removeSeeds(seeds, config)
+  goToHarvestPoint(config)
 
   print('> remove ' .. utils.sizeof(seeds) .. ' seed(s)')
   local stateSeeds = seeds -- warning: do not mutate the data (only the ref)
@@ -369,8 +383,8 @@ local function removeSeeds(seeds)
     end
   end
 
-  goBackToHome()
-  dropAllProcedure()
+  goBackToHome(config)
+  dropAllProcedure(config)
 end
 
 local function retrieveSeeds(seeds)
@@ -406,7 +420,8 @@ local function retrieveSeeds(seeds)
   return seedRetrieved
 end
 
-local function retrieveFertilizedEssences()
+-- first parameter is config
+local function retrieveFertilizedEssences(_)
   local storageInventory = turtleUtils.waitForInventory('bottom', WAIT_ITEM_IDLE_TIME)
   local bufferInventory = turtleUtils.waitForInventory('front', WAIT_ITEM_IDLE_TIME)
 
@@ -435,8 +450,8 @@ local function retrieveFertilizedEssences()
   return false
 end
 
-local function replantSeeds()
-  goToHarvestPoint()
+local function replantSeeds(config)
+  goToHarvestPoint(config)
 
   print('> replant seeds')
 
@@ -466,18 +481,12 @@ local function replantSeeds()
     end
   end
 
-  goBackToHome()
+  goBackToHome(config)
 end
 
-local function replantProcedure()
-  local remotePlan = fetchRemotePlan()
-
-  if remotePlan == nil then
-    error('cannot fetch the remote plan')
-  end
-
+local function replantProcedure(remotePlan, config)
   if localPlan == nil then
-    retrieveLocalPlan()
+    retrieveLocalPlan(config)
   end
 
   if localPlan == nil then
@@ -488,12 +497,12 @@ local function replantProcedure()
   local seedsToPlant = utils.shallowDiff(remotePlan, localPlan)
 
   if utils.sizeof(seedsToRemove) > 0 then
-    removeSeeds(seedsToRemove)
+    removeSeeds(seedsToRemove, config)
   end
 
   if utils.sizeof(seedsToPlant) > 0 then
     if retrieveSeeds(seedsToPlant) then
-      replantSeeds()
+      replantSeeds(config)
     end
   end
 
@@ -512,11 +521,11 @@ local function main()
 
   print("Starting Trap's inferium harvester v" .. VERSION)
 
-  if not hasEnoughFuel() then
+  if not hasEnoughInitialFuel() then
     turtleUtils.refuelAllFromInventory()
   end
 
-  if not hasEnoughFuel() then
+  if not hasEnoughInitialFuel() then
     error('Not enough fuel', 0)
   end
 
@@ -529,17 +538,21 @@ local function main()
     print('> Starting cycle ' .. tostring(cycleNumber))
     print()
 
-    dropAllProcedure()
+    local remotePlan = fetchRemotePlan()
+    local config = LOCAL_CONFIG
+
+    dropAllProcedure(config)
     refuelProcedure()
 
-    replantProcedure()
+    -- TODO: change parameters to be just config
+    replantProcedure(remotePlan, config)
 
     if config.fertilizedBoost then
       print('> fertilized boost enabled')
-      retrieveFertilizedEssences()
+      retrieveFertilizedEssences(config)
     end
 
-    harvestProcedure()
+    harvestProcedure(config)
 
     cycleNumber = cycleNumber + 1
   end