I'm thinking of taking a run at my first top quilt and being in Arizona, I am thinking a 40 degree or so should be okay for my first try. I was thinking of trying a sewn through karo step style. Is this a bad idea? Feasible? 40 degrees a realistic temperature goal? I understand the down side of a sewn through top or underquilt but for a "useable" practice, light summer quilt will this work?