I am building a square beam cabin. I am milling logs into 8by8 beams. My question is is it better to plane a champfer on the corner of each log? Or would you suggest milling 1/2 to 3/4 in. boards between the beams to leave chinking space.Also, do you recomend the modern strechy chinks or a more! traditional mortar sand mix? Thanks for any help you can give