I never liked those 8"x 10" Paterson contact-printing frames. Everything looks too crammed up onto a single sheet of paper.
The Paterson Pro-Proofer/Copy Board is a much better buy.
http://www.patersonphotographic.com/...m-details1.htm
I much prefer to make contact sheets with 12"x 9.5" papers for 35mm and 120 rollfilms using a sheet of glass from a photo-frame. The negatives are placed in transparent negative storage sleeves first.
For 35mm-36 exposure films, I cut them into six separate strips of 5 negatives and then a final strip of six negatives.
Using 12" x 9.5" papers for contact-sheets makes choosing which negatives I want to enlarge much easier IMHO.