Darn! the doors won't shut!!!

I replaced all of the weatherstripping on my W100 and had to slam the doors to get them to latch. My neighbor has worked for years at a body shop doing insurance work. He says that many customers complain because the new door seal almost knocks them over when they open it. He said give it a week or so out in the sun and the doors shut like new. He is right, my truck doors shut and seal perfect.