1/4 sawn is great for board bows, the best in my opinion. Assuming you want a 27-28" draw I would go 66-67" long overall, about 1 5/8" wide. The handle would be 4" long, on center with 1 1/2" long fades off each end of the handle. I would measure 20" from center both ways and make my limbs a parallel 1 5/8" to that point, then straight taper to 1/2" wide tips.