The Ten Eyck Coat is finished.
What I do, since I don't have a male mannikin, is I take my items to Church on Sunday, find a guy the right size, and take pictures. It looks a lot better than using my oh-so-female mannikin in my poorly-lit sewing room.
Once I got all the buttonholes done on the front of the lapels, there was just a lot of basic stitching left: all down the back pleats and the hem, and down the raw edges of the lapels.
The little arrow-pointed part of the lapel gave me the most trouble; trying to get it to lie smoothly against the small collar over the slope of the chest and shoulder was finicky. Everything else came together fairly well. If I feel motivated you might see pictures of the inside, eventually.