I did, and you're right. It was my understanding of the Covenants that convinced me. I had heard all the arguments but only came to really understand them very recently.

In this blog post I explained what I think the differences are.

Now on each of those three major points (hermeneutics, covenant, and RPW) I have come to a completely different conclusion. Read the post, if you please, and comment (here) if you think my description was accurate. I can now defend the paedobaptist position on each of those three points of difference. Although starting a whole 'nother paedo/credo debate on this forum would be unwise and unwanted. The topic has been exhausted IMO.