The templates are attached in this step for easy fabrication. I laser cut these pieces because it was the fastest way to do it, but this could easily be fabricated using the method I described in my Digital Fabrication by Hand instructable.
The PDF should be printed at 36" X 36" as shown in the layout, but you could also tile smaller pages for the same effect. That being said, this design is so simple that it might be easier to just go with the dimensions on the diagram in the previous step and just lay it out with a pencil and straight edge.
I cut out the trim pieces with mitered corners to save wood, but it might be easier to just cut everything out in whole pieces as shown in the templates since the separate pieces are tricky to line up perfectly.
The assembly process is super simple- just glue, brad nail, and clamp together until the glue dries. I recommend finishing the wood before assembly since it would be tricky and messy to get the finish into the record cavity.
I added some keyhole hangers to the back of the frame when I was done- this seemed like the most secure way to hang the frames on the wall. Using picture wire would be tricky since presumably I'll be taking these records out frequently to play them.