"I hate deltas with a passion" Have you seen Piper 2 or Voron 2 designs? They are not IDEX, but they are coreXY designs with moving gantry and stationary bed. Both use 4 Z motors and run on Klipper. BTW Klipper has support for IDEX. [Edit] I should say 4 independent Z motors and have mechanical gantry leveling.