diff --git a/Makefile b/Makefile
index 99297c0..8845a4a 100644
--- a/Makefile
+++ b/Makefile
@@ -46,6 +46,8 @@ install.radare.projects:
 #   just the Xx30 series, these generic rules will need to be reworked
 
 # keep intermediate files
+.PRECIOUS: %.orig
+.PRECIOUS: %.img
 .PRECIOUS: %.img.orig
 
 # Generate a working file with any known patches applied
@@ -81,3 +83,9 @@ x220.8DHT34WW.img.enc.slice: x220.8DHT34WW.s01CB000.FL2.orig
 x230.G2HT35WW.img.enc.slice: x230.G2HT35WW.s01D3000.FL2.orig
 t430.G1HT35WW.img.enc.slice: g1uj38us.iso.orig
 t430s.G7HT39WW.img.enc.slice: g7uj18us.iso.orig
+
+x230.G2HT35WW.s01D3000.FL2: x230.G2HT35WW.img.enc.slice x230.G2HT35WW.img.enc
+
+# Hacky, non generic rule
+x230.G2HT35WW.s01D3000.FL2: x230.G2HT35WW.img.enc
+	./slice.insert $<.slice $< $@
diff --git a/slice.extract b/slice.extract
index 74506dd..de60319 100755
--- a/slice.extract
+++ b/slice.extract
@@ -24,5 +24,5 @@ read SOURCE OFFSET LENGTH <"$INFOFILE"
 
 set -x
 
-dd iflag=count_bytes,skip_bytes if=$SOURCE skip=$[$OFFSET] count=$[$LENGTH] of="$OUT"
+dd status=none iflag=count_bytes,skip_bytes if=$SOURCE skip=$[$OFFSET] count=$[$LENGTH] of="$OUT"
 
diff --git a/slice.insert b/slice.insert
new file mode 100755
index 0000000..bcb398c
--- /dev/null
+++ b/slice.insert
@@ -0,0 +1,36 @@
+#!/bin/bash
+#
+# Quick and dirty script to insert a slice into a binary file
+# Copyright (C) 2016 Hamish Coleman
+#
+# TODO:
+# - a tool that is portable to Windows
+# - should output dependancy information
+
+INFOFILE="$1"
+if [ ! -r "$INFOFILE" ]; then
+    echo Need file with source and offset info
+    exit 1
+fi
+shift
+
+INPUT="$1"
+if [ -z "$INPUT" ]; then
+    echo Need input filename
+    exit 1
+fi
+shift
+
+OUT="$1"
+if [ -z "$OUT" ]; then
+    echo Need output filename
+    exit 1
+fi
+
+read SOURCE OFFSET LENGTH <"$INFOFILE"
+
+set -x
+
+cp --reflink=auto $SOURCE $OUT
+dd status=none if=$INPUT bs=$[$LENGTH] count=1 | dd status=none conv=notrunc bs=$[$OFFSET] seek=1 of="$OUT"
+