Spin: random axis duration between 2..5 seconds

modes/Spin.cc

@@ -106,5 +106,5 @@ void Spin::getRandomAxis(float (*axis)[3])
 
 uint32_t Spin::getRandomSwitchTime()
 {
-    return 3000u + (uint32_t) (rand() / (double)RAND_MAX * 3000.0);
+    return 2000u + (uint32_t) (rand() / (double)RAND_MAX * 3000.0);
 }