I got three Saitek’s Pro Flight Instrument Panels. They are good but expensive, too. Moreover, the more of this FIP are attached to a system, the more impact of it affects FSX’s performance.
AIRSPEED <—> RPM
ATTITUDE <—> DIRECTION
ALTITUDE <—> VERTICAL SPEED
Under this arrangement, I can simply press the up and down buttons to easily access the six basic gauges on small planes I usually fly.