Assign To Exclusive Group: 4

Assigns the selected pad/button to exclusive group 4.

Use Logic Pro Drum Machine Designer pad controls — Apple Support

Exclusive Group: Choose a group for the pad. You can assign multiple pads to the same group. As soon as one drum sound in the group is triggered, all other sounds in that same group are stopped. For example, you could group three pads with open, semi-closed, and closed hi-hat sounds. Only one of these sounds can be played at a time, mirroring the behavior of real hi-hats.

Create and customize Drum Machine Designer kits in Logic Pro — Apple Support

Create custom Drum Machine Designer kits with more than 2000 kit pieces patches from the Logic Pro sound library or use your own samples.

I keep thinking that the Drum Machine Designer could help with “drum replacement” or “drum enhancement”l. A lot of experimentation needs to happen.