Despite the excellent design and graphic renditions, the A2A C172 Trainer is really a migraine when coming to the Saitek gears. Gauge reading problems encountered have been reported on its support forum but so far non solution is reached.
Followings are images showing the RPM readings on Saitek’s FIPs, iPad’s RF Cockpit and FSi C172 Cockpit. The readings on all these platforms are consistent. But not the A2A C172 one.