diff --git a/spnav.c b/spnav.c
index ac6c103..a7f0030 100644
--- a/spnav.c
+++ b/spnav.c
@@ -4,8 +4,6 @@
 #include "spnav.h"
 #include "hidapi.h"
 
-#define DEBUG
-
 #ifdef DEBUG
 #define DEBUG_PRINT(...) do{ fprintf( stderr, __VA_ARGS__ ); } while( false )
 #else
@@ -37,11 +35,11 @@ int convert_input(int first, unsigned char val) {
     }
 }
 
-bool in_deadzone(unsigned char *data) {
+bool in_deadzone(unsigned char *data, int threshold) {
     /* data[0] is the event type */
     int i;
     for (i=1; i<SPNAV_NAXIS; i++) {
-        if (data[i] != 0) {
+        if (data[i] > threshold) {
             return false;
         }
     }
@@ -51,7 +49,6 @@ bool in_deadzone(unsigned char *data) {
 
 int read_event(hid_device *device, spnav_event* ev, int ms) {
     unsigned char buf[64];
-    int i;
     int nbytes = hid_read_timeout(device, buf, sizeof(buf), ms);
     if (nbytes < 0) {
         DEBUG_PRINT("hid_read_timeout() error");
@@ -64,7 +61,7 @@ int read_event(hid_device *device, spnav_event* ev, int ms) {
 
     switch (ev->type) {
         case TRANSLATION:
-             if (in_deadzone(buf)) {
+             if (in_deadzone(buf, 4)) {
                 ev->type = 0;
                 return ev->type;
             }
@@ -72,13 +69,10 @@ int read_event(hid_device *device, spnav_event* ev, int ms) {
             ev->motion.x = convert_input((buf[1] & 0x0000ff), buf[2]);
             ev->motion.y = convert_input((buf[3] & 0x0000ff), buf[4]);
             ev->motion.z = convert_input((buf[5] & 0x0000ff), buf[6]);
-            for (i=0; i < SPNAV_NAXIS; i++) {
-                ev->motion.data[i] = buf[i];
-            }
             // DEBUG_PRINT("Translation x=%d, y=%d, z=%d\n", ev->motion.x, ev->motion.y, ev->motion.z);
             break;
         case ROTATION:
-            if (in_deadzone(buf)) {
+            if (in_deadzone(buf, 4)) {
                 ev->type = 0;
                 return ev->type;
             }
@@ -86,9 +80,6 @@ int read_event(hid_device *device, spnav_event* ev, int ms) {
             ev->motion.rx = convert_input((buf[1] & 0x0000ff), buf[2]);
             ev->motion.ry = convert_input((buf[3] & 0x0000ff), buf[4]);
             ev->motion.rz = convert_input((buf[5] & 0x0000ff), buf[6]);
-            for (i=0; i < SPNAV_NAXIS; i++) {
-                ev->motion.data[i] = buf[i];
-            }
             // DEBUG_PRINT("Rotation rx=%d, ry=%d, rz=%d\n", ev->motion.rx, ev->motion.ry, ev->motion.rz);
             break;
         case BTN:
diff --git a/spnav.h b/spnav.h
index 21c07a1..3368fb2 100644
--- a/spnav.h
+++ b/spnav.h
@@ -26,7 +26,7 @@ struct event_motion {
 	int x, y, z;
 	int rx, ry, rz;
 	unsigned int period;
-	int data[SPNAV_NAXIS];
+	int *data;
 };
 
 struct event_button {
@@ -50,9 +50,10 @@ int SPNAV_API_EXPORT_CALL spnav_close(void);
 // TODO : return event type
 int SPNAV_API_EXPORT_CALL spnav_wait_event(spnav_event *event);
 int SPNAV_API_EXPORT_CALL spnav_wait_event_timeout(spnav_event *event, int timeout);
-//spnav_event SPNAV_API_EXPORT_CALL read_event(int timeout);
+int SPNAV_API_EXPORT_CALL spnav_sensitivity(double sens);
 
 #ifdef __cplusplus
 }
 #endif
+
 #endif /* SPNAV_H__ */
\ No newline at end of file