So this is the relevant bit, do any mods or blocks mentioned within look familiar?:
[15:27:31] [CoFHUpdater/WARN] [RedstoneArsenal]: Update check for Redstone Arsenal failed.
java.io.FileNotFoundException:
https://raw.githubusercontent.com/CoFH/RedstoneArsenal/master/VERSION
at sun.net.
www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) ~[?:1.7.0_67]
at sun.net.
www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source) ~[?:1.7.0_67]
at java.net.URL.openStream(Unknown Source) ~[?:1.7.0_67]
at cofh.mod.updater.UpdateCheckThread.run(UpdateCheckThread.java:44) [UpdateCheckThread.class:?]
[15:27:31] [Client thread/INFO] [Mantle-STDERR]: [vswe.stevescarts.Blocks.ModBlocks]: Failed to create block (BlockDistributor)
java.lang.IllegalArgumentException: Duplicate id: distributor
at net.minecraft.tileentity.TileEntity.func_145826_a(TileEntity.java:43)
at cpw.mods.fml.common.registry.GameRegistry.registerTileEntity(GameRegistry.java:275)
at vswe.stevescarts.Blocks.ModBlocks.init(ModBlocks.java:83)
at vswe.stevescarts.StevesCarts.preInit(StevesCarts.java:87)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:513)
at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:208)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:187)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:513)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:239)
at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:480)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:867)
at net.minecraft.client.main.Main.main(SourceFile:148)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)