The door fits!

After I finished all the walls and paint, I discovered the existing wall next to the stairs was completely out of level. This really complicated things when I went to fit the new knotty alder door and discovered it wasn't going to open properly at all. The existing wall was about an inch out of level from top to bottom, and the other side of the door opening I had redone, and of course, made level. So began the challenge of how do I fit a door to an opening that's completely out of level? What I decided to do was to keep the casing completely level, but cut away some of the wood from one side, and add some additional wood to the other. Thus began the door casing surgery...

I added an additional strip of knotty alder to one side, using biscuits and glue.

After sanding and before any cutting. I set the casing level and
marked the backside to follow the contours of the wall.

Cutting the sides to match the un-level wall.

Nailed into place.

Close look at how far off the wall is, and how much
additional wood had to be added.

Is closes perfectly and is level!

Another look at the wonky side.

A look at the door from the stairwell side.

Moulding and Baseboard

Well, it's reached that moment for finish work, which is nice as I'm sick of all that other stuff. I started to nail in all the door moulding and baseboard in the hallway, tv room, and stairwell. I also installed all of the new solid-core doors. Two in the stairwell and two in the mini-hallway. I also installed the existing louvered bifold door I had for the entrance to the a/v room.

Storage room and laundry room doors all finished.

A look from another angle, showing the baseboard. 

The bifold door to the a/v room all finished out.

New door to the spare room.

Door the exercise room all trimmed out.

New door to the bathroom.

As I somehow screwed up the dimensions for the a/v room opening, I had to shave off 1/8" of each side of the bifold door ( 1/4" in total width wise ) and also cut down some of it for height. Thank god it was made of of solid wood and I could actually cut it down. Thank you 20th century construction... That took hours, but it now fits well after all the tweaking of getting it to sit even in the middle of the opening and making sure it had enough clearance top and bottom.