diff --git a/usr/99-calibration.conf-3508-FLIP-H b/usr/99-calibration.conf-3508-FLIP-H
new file mode 100755
index 0000000..f078e05
--- /dev/null
+++ b/usr/99-calibration.conf-3508-FLIP-H
@@ -0,0 +1,6 @@
+Section "InputClass"
+        Identifier      "calibration"
+        MatchProduct    "ADS7846 Touchscreen"
+        Option  "Calibration"   "233 3945 3939 183"
+        Option  "SwapAxes"      "1"
+EndSection
diff --git a/usr/99-calibration.conf-3508-FLIP-V b/usr/99-calibration.conf-3508-FLIP-V
new file mode 100755
index 0000000..41824fd
--- /dev/null
+++ b/usr/99-calibration.conf-3508-FLIP-V
@@ -0,0 +1,6 @@
+Section "InputClass"
+        Identifier      "calibration"
+        MatchProduct    "ADS7846 Touchscreen"
+        Option  "Calibration"   "3945 233 183 3939"
+        Option  "SwapAxes"      "1"
+EndSection