This is a room of my horizontal wall/ceiling project going on. I'm a masochist. I dropped the Cedars and let them sit a year to peck up. Milled it on the band mill and stacked it in the drying shed for a half year. Wide boards, not so straight after drying. Chalk line and free hand through the table saw with a 2° under cut. To install I scribe, bevel square, whatever it takes. Finished with two heavy coats of Shellac. The process is slow as molasses. I could have bought lumber but no. My wife thinks I'm crazy and I'm starting to agree.