what car seats work with uppababy vista V3 Stroller + Mesa V3 Seat Travel System Combo – Toddler Seat, Bumper Bar, Bug and Rain Shields, Car Seat Base, and Infant Insert Included – Callum ( creating a seamless travel Mockingbird Modular Single-to-Double Full Activity:Run Model Family:Specialized Allez

what car seats work with uppababy vista V3 Stroller + Mesa V3 Seat Travel System Combo – Toddler Seat, Bumper Bar, Bug and Rain Shields, Car Seat Base, and Infant Insert Included – Callum ( creating a seamless travel Mockingbird Modular Single-to-Double Full Activity:Run Model Family:Specialized Allez

Mockingbird Modular Single-to-Double Full Size Stroller 3.0 - Oat: Canopy, Folds for Easy Transport, Adjustable Handle, Machine Washable Seat Pad : Target

The curves downward providing extra coverage up front

Activity:Run

Model Family:Specialized Allez

There's nothing wrong with the holder as it is, I just tend to "improve" things

creating a seamless travel system