We finally got back to half bath window trim tonight.
Last time I just finished the jamb extensions. You can still see the shims sticking out.
So here is the casing installed!
For the apron, I ripped a piece of the casing in half and glued it to a piece of flat stock to form the correct profile.
Once sanded and the ends cut it will match the original aprons and once stained the joint will be hardly visible.