Following this advice, i went into the LBS today and had them level my seat. I know when I bought the bike we pointed it down a bit and I've been using a lot of energy to keep pushing my sit bones back up onto the saddle. I also suffered occasional elbow pain, as does DH (which when we mentioned to the LBS store, they said they'd never heard of before).
It's my first "bike adjustment" since my original fitting when I bought it. Feels like an event to be celebrated or something.