Gonna need a bigger scale

A naked Elliott weighed in at 18 pounds, 2 ounces today. Today, as he turns 4 months, he is a mere 8 ounces shy of doubling.  This cannot be sustainable, right?  
While weighing him*, I was struck by how tight the fit is now on the infant attachment of his baby scale.  Figured that merited a blog picture.

* Your Question: Why do I still weigh him every few days?  Dan's Answer: I am a metrics and measurement geek professional.