What this guide covers
Create named groups with their own item requirements inside a custom bundle.
Partition the assortment
A section can source products, variants, or collections. Keep sections non-overlapping so every paid item has one clear home.
Set item counts
Give each section a minimum and an optional maximum. Counts use quantities, not just distinct products.
Align the discount step
The overall paid-item step still applies. Make sure its minimum makes sense alongside the sum of the section requirements.