Further fixing up parameters

ROMFS/px4fmu_common/init.d/airframes/50003_aion_robotics_r1_rover

@@ -17,8 +17,6 @@
 
 sh /etc/init.d/rc.rover_defaults
 
-roboclaw start /dev/ttyS3 128 1200
-
 if [ $AUTOCNF = yes ]
 then
 	param set BAT_N_CELLS 4
@@ -68,8 +66,18 @@ then
 
 	# Enable Airspeed check circuit breaker because Rovers will have no airspeed sensor
 	param set CBRK_AIRSPD_CHK 162128
+
+	# Differential drive acts like ackermann steering with a maximum turn angle of 180 degrees, or pi radians
+	param set GND_MAX_ANG 3.1415
+
+	param set RBCLW_BAUD 8
+	param set RBCLW_COUNTS_REV 1200
+	param set RBCLW_ADDRESS 128
 fi
 
+# Start this driver after setting parameters, because the driver uses some of those parameters.
+roboclaw start /dev/ttyS3
+
 # Configure this as rover
 set MAV_TYPE 10