Hi. If I were you and your just getting into this, then do what Chip Mull asks you to do. I have used Chips line of covering before. Infact I have a 60" J-3 Cub that I covered about 15 years ago. It has been in the raffters most of 12 years. Not a sag wrinkel or released seam anywhere on the plane. No bubbles over covered sheeted areas. This is by far a better covering system than any of the "iron on" coverings out there today. It is very easy to use and will add more strenght than you might imagne to your airframe.
I am covering my 33% Waco YMF-5 with this system. It doesn't add much more weight than iron on coverings and the cost differance is minumal but worth the cost in the long run. And if you happen to tear it or get a hole in it some how it is very easy to repair.
Just my thoughts.

Steve