Bird Watching: Why do I always make everything too big?, 1 by Elphaba

Elphaba wrote:
Pelle, I had an idea. I really should remember to feed my brain! I was thinking about how to score the inside, but I had a leftover slat of thin, lightweight wood that I used under the shingles. I cut it to 5" and then scored it with the saw at about 1/2 - 3/4 inch intervals. Will that work if I staple it on the inside under the hole like a ladder? Take a look. Should I make more cuts? Deeper ones?