Photoshop Layer Comps are too large

I'm making wireframes for a complex dashboard. I have 40+ layer comps and my 10MB photoshop file is turning into a 30MB PDF. I've already trimmed away unused layers and don't see what else I can do?

I've been doing this for a while and never had a file with such bloat. (Then again this is the first one I'm doing with 47 layer comps.)