We are considering purchasing a Chicco Next fit zip from babies r us. I am interested in being able to place a piddle pad under the zip cover since it zips off. I have some understanding of the compression issue and of the idea that after market accessories are not made to the same standards as the manufacturer. Chicco does not make a piddle pad, to my knowledge so that option is out. I see that Britax and Diono both make them however I am obviously considering a Chicco seat. Someone who is certified, please help me. I am aware of the puppy pad option. Because we are looking at the next fit zip, it seems more logical to put it under the zip cover. I have heard that piddle pads are not safe yet if I buy a Britax car seat with their pad it is? Help me.