Accessory Without Thread
Guideline 4.0 manages stacks using Accessory Without Thread (WT). In a FCS stack, this element must be placed on top and requires a specific seat's geometry in the workpiece.
WT is available in FCS catalogue for M16 size only.
Tutorial can be watched in this VIDEO
To define a stack using it in Guideline 4.0, enter in Piece Settings and activate WT toggle: