diff --git a/light8/serport.i b/light8/serport.i
--- a/light8/serport.i
+++ b/light8/serport.i
@@ -34,6 +34,10 @@
     #define CHAN_TO_TUPLE_POS(chan,idx) i2c_smbus_write_byte(file, chan);\
     PyTuple_SetItem(t,idx,PyInt_FromLong(i2c_smbus_read_byte(file)));
 
+    /*
+      these are shuffled here to match the way the pots read in. in
+      the returned tuple, 0=left pot..3=right pot.
+    */
     CHAN_TO_TUPLE_POS(1,0)
     CHAN_TO_TUPLE_POS(2,1)
     CHAN_TO_TUPLE_POS(3,2)