Something not mentioned yet is where to map your gun switch.
I map mine to a switch on the throttle. Why? Because, hand motion on the throttle does not cause the joystick to move, which in turn, can cause "bobbing". If you have a separate throttle, try it. It helped my gunnery. All guns are mapped to throttle. Secondary guns are still mapped to trigger. This way I can isolate the guns on planes with mixed armament, such as the Yaks, Ki-61, 190s 109s and Spitfires. Likewise, you can fire just 4 guns on the P-47 using the trigger switch (usually enough), or cut loose with all 8 with the throttle switch. Adds some flexibility, extends usefull ammo load as well as reducing "bobbing".
My regards,
Widewing