diff --git a/src/main/scala/li/cil/oc/common/item/Tablet.scala b/src/main/scala/li/cil/oc/common/item/Tablet.scala
index 14bd58b8c..0a9351083 100644
--- a/src/main/scala/li/cil/oc/common/item/Tablet.scala
+++ b/src/main/scala/li/cil/oc/common/item/Tablet.scala
@@ -20,6 +20,7 @@ import li.cil.oc.api.driver.item.Chargeable
 import li.cil.oc.api.driver.item.Container
 import li.cil.oc.api.internal
 import li.cil.oc.api.machine.MachineHost
+import li.cil.oc.api.network.Connector
 import li.cil.oc.api.network.Message
 import li.cil.oc.api.network.Node
 import li.cil.oc.client.KeyBindings
@@ -237,6 +238,8 @@ class TabletWrapper(var stack: ItemStack, var player: EntityPlayer) extends Comp
 
   private var lastRunning = false
 
+  def isCreative = data.tier == Tier.Four
+
   def items = data.items
 
   override def facing = RotationHelper.fromYaw(player.rotationYaw)
@@ -401,6 +404,9 @@ class TabletWrapper(var stack: ItemStack, var player: EntityPlayer) extends Comp
       }
     }
     if (!world.isRemote) {
+      if (isCreative && world.getTotalWorldTime % Settings.get.tickFrequency == 0) {
+        machine.node.asInstanceOf[Connector].changeBuffer(Double.PositiveInfinity)
+      }
       machine.update()
       updateComponents()
       data.isRunning = machine.isRunning
diff --git a/src/main/scala/li/cil/oc/common/tileentity/Microcontroller.scala b/src/main/scala/li/cil/oc/common/tileentity/Microcontroller.scala
index ffe21918f..e12489109 100644
--- a/src/main/scala/li/cil/oc/common/tileentity/Microcontroller.scala
+++ b/src/main/scala/li/cil/oc/common/tileentity/Microcontroller.scala
@@ -52,6 +52,8 @@ class Microcontroller extends traits.PowerAcceptor with traits.Hub with traits.C
   @SideOnly(Side.CLIENT)
   override def canConnect(side: EnumFacing) = side != facing
 
+  override def sidedNode(side: EnumFacing): Node = if (side != facing) super.sidedNode(side) else null
+
   @SideOnly(Side.CLIENT)
   override protected def hasConnector(side: EnumFacing) = side != facing
 
@@ -171,7 +173,7 @@ class Microcontroller extends traits.PowerAcceptor with traits.Hub with traits.C
 
   override def onMessage(message: Message): Unit = {
     if (message.source.network == snooperNode.network) {
-      for (side <- EnumFacing.values if outputSides(side.ordinal)) {
+      for (side <- EnumFacing.values if outputSides(side.ordinal) && side != facing) {
         sidedNode(side).sendToReachable(message.name, message.data: _*)
       }
     }
diff --git a/src/main/scala/li/cil/oc/common/tileentity/ServerRack.scala b/src/main/scala/li/cil/oc/common/tileentity/ServerRack.scala
index 3286af6db..7ac919e59 100644
--- a/src/main/scala/li/cil/oc/common/tileentity/ServerRack.scala
+++ b/src/main/scala/li/cil/oc/common/tileentity/ServerRack.scala
@@ -69,6 +69,8 @@ class ServerRack extends traits.PowerAcceptor with traits.Hub with traits.PowerB
 
   override def canConnect(side: EnumFacing) = side != facing
 
+  override def sidedNode(side: EnumFacing): Node = if (side != facing) super.sidedNode(side) else null
+
   // ----------------------------------------------------------------------- //
 
   def isRunning(number: Int) =
@@ -107,7 +109,7 @@ class ServerRack extends traits.PowerAcceptor with traits.Hub with traits.PowerB
     sides(number) match {
       case Some(serverSide) =>
         val serverNode = server.machine.node
-        for (side <- EnumFacing.values) {
+        for (side <- EnumFacing.values if side != facing) {
           if (toLocal(side) == serverSide) sidedNode(side).connect(serverNode)
           else sidedNode(side).disconnect(serverNode)
         }
diff --git a/src/main/scala/li/cil/oc/common/tileentity/traits/PowerBalancer.scala b/src/main/scala/li/cil/oc/common/tileentity/traits/PowerBalancer.scala
index 624701b87..070d5b215 100644
--- a/src/main/scala/li/cil/oc/common/tileentity/traits/PowerBalancer.scala
+++ b/src/main/scala/li/cil/oc/common/tileentity/traits/PowerBalancer.scala
@@ -62,6 +62,6 @@ trait PowerBalancer extends PowerInformation with SidedEnvironment {
 
   private def isPrimary(connector: Connector) = {
     val nodes = connectors
-    connector != null && nodes(nodes.indexWhere(_.network == connector.network)) == connector
+    connector != null && nodes(nodes.indexWhere(node => node != null && node.network == connector.network)) == connector
   }
 }