I live in an old log home in Oregon, not made from a kit. There are a large number of casement windows, some open, some do not. They appear to be made from either quarter-sawn hemlock or fir. I have searched, but cannot find true 5/4 (after planing) material so will be forced to buy 2X6 clear fir and plane it to make storm windows. I am unclear as what bits I can use to fabricate these and at the same time use mortise and tenon joints at the corners, as well as a molding bit for the muttins. These windows will be four foot high by two feet wide and use three muttins. Any assistance or suggestions would be greatly appreciated. Rich