I must be missing something, I set my Warthog throttle up in Alt Launcher Axis Assign and it couldn’t be easier.
Select “Assign” for Throttle, pull back to Idle Detent stop (top pic), click “Idle Detent” button. Push throttle forward to the AB stop, click “Set AB” button. Save and done. Push past the AB stop and bar turns green and says “AB”, lift past Idle stop and bar turns red and says “Idle Cutoff”. Just be sure you have full travel (if not increase Saturation until bar is full)
When you setup your Throttle in AL are you using Throttle or Throttle Right? When I get to the Idle stop Asix travel is at zero.