Here it is all dry fit.
I have not glued it together yet as I want to add two cross braces about a third of the way in from each side. This will give me better support and also give me another place to screw the base into the bottom with slots for wood movement.
Next I milled up the 4/4 lumber that is going to be used for the base.
And here they are LOOSELY dry fit to the bottom.
I still need to cut them to exact length and glue them together. I'm not in a huge hurry for that as I had to order the router bit I need for the profile so it won't be here for a while. But I think what I will start on next are the two main vertical support in the center of the cabinet, as well as the outside verticals. I'm not completely sure how I want to attach these to the base, but I am leaning toward mortise and tenon here as well; input welcome on that one.
Well, back to the jointer and planer...