M1A1 doesn’t have the same behavior. You would still have all the same functionality in the Hydraulic System. Reason is the LVDT’s in the handles and LVDT’s in the Elevation/Traversing Mechanisms still continue to communicate through the FCS. The 3rd stage valves still providing the back pressure corrections and releasing the extra pressure back through the servos while monitored by the Delta P while using the release valves. Of course these signals are provided by Control Handles, the Mirror movements and the Gun positing as the Mirrors are now following the Gun which your Gyros inputs are turned off and the Emergency mode FCS symptoms are active such as no lead and Ballistic Solutions.