I did use white card bases to make my paper stretch further. They were 4x51/2, which allowed me to use more B & T on each card. I kept them to a couple of designs, only changing up the papers. There is an awesome striped sheet that I cut up and used. I didn't show all 34 because I had a lot of multiples.
I loved the results. Even more I loved that I could have so much variety and still keep it simple.