While diagnosing the problem that was keeping your settings menu from appearing, I installed the Powerwerx programming software and noticed that while D version had a single setting for bandwidth that adjusted both the RX bandwidth and TX bandwidth at the same time. The X model has a separate setting for RX bandwidth and TX bandwidth. So with CHIRP you could only set and control the RX bandwidth and the TX bandwidth was "stuck" at the default NARROW (NFM) setting.