diff --git a/lumps/catoptromancy/demo3_p1.lmp b/lumps/catoptromancy/demo3_p1.lmp
deleted file mode 100644
index 3411b559..00000000
Binary files a/lumps/catoptromancy/demo3_p1.lmp and /dev/null differ
diff --git a/lumps/chungy/c3m9.lmp b/lumps/chungy/c3m9.lmp
new file mode 100644
index 00000000..78ccdcaf
Binary files /dev/null and b/lumps/chungy/c3m9.lmp differ
diff --git a/lumps/demo3_p1.lmp b/lumps/demo3_p1.lmp
index e5a3809d..1289b4cd 120000
--- a/lumps/demo3_p1.lmp
+++ b/lumps/demo3_p1.lmp
@@ -1 +1 @@
-catoptromancy/demo3_p1.lmp
\ No newline at end of file
+chungy/c3m9.lmp
\ No newline at end of file