I hear your pain! When we bought our 2014 Black Rock last year, I downloaded the handbook from Outdoors RV's website. Disapppointed to find it's generic to a number of models. They could use a good logistics person to create downloadable components! In short, the manual is not much use on specifics.
Suggest you do as we have done - print off the manual, and put it in a loose-leaf three ring binder, and add notes as you visit or see your trailer as things occur to you. Hopefully, within a season or so, it will become useful. You'll have to visit suppliers' websites to download specifics on things like refridgerators or stereos. But it's fun, and worth the effort. Plus, as you travel and get to meet other owners, you can share mutual findings around the campfire. That way you'll wind up with good friends and a better manual.
If your new trailer has the same awning mine does, you're in for a treat. It works easily and intuitively, and has an automatic weight sensor to release water at one end should it pool. It's so easy to operate, it's unbelievable (compared to the old manual unit I had on my previous trailer!)
Happy research! Enjoy,