Review on Baby Jogger/Graco Car Seat Adapter: Seamlessly Attach Summit X3 Stroller for Ultimate Convenience by Brockington Zuniga

If you are looking for a Greco connection for a twin stroller this will work. Tramp. I've tried all types and these work the best. All you have to do is remove the top and recline the seat. And you only need to use one side of this bracket kit. Make sure the seat is fully latched by placing a weight on the car seat. If it doesn't bounce back, that's good. I don't think it works on twins. Two car seats next to each other most likely will not fit. But it works great for my toddler and newborn