GoGo Babyz Travelmate - Britax Car Seat Adapter

We have been struggling for the past two years to carry our Britax car seat through the airport. We have a GoGo Baby Travelmate dolly, but it doesn't fit the Britax, and the car seat kept slipping off. Moreover, the GoGo Babyz strap had a tendency to jam at the most inopportune times, specifically when I was in the passenger boarding bridge spending 30 minutes trying to unbuckle the car seat.

This printed part firmly attaches to the GoGo Babyz Travelmate, and allows a Britax car seat to res