Car Seats

We are about to sell our travel system, a part of which is the graco snugrider car seat. we also have the graco snugrider infant car seat stroller frame, which supposedly only fits the graco snugrider car seat. i am wondering if someone else has used this stroller frame with a different brand of car seat?

I wouldnt use anything that is nt meant to be put together whether it works or not, you are putting a baby in it and you dont want to risk it