FastLane machine Savage XL Hybrid Bulkheads

Hello there folks, I would like to get a pair of FastLane machine Savage XL Hybrid Bulkheads for my Brushless Savage X SS, already transformed with Flux/XL cups (those with a larger inner diameter) and dogbones, and I wonder whether the bulks are compatible with such Cups (i.e., if the cups will fit in the bulk holes)

I'm asking this because I noticed that a pair of cups are sold togheter with the bulk, and is it not clear to me if such cups are the same of HPI Flux cups or not.

Thanks, Andrea.