I was working on a chimney rebuild in Akron last month and the old mason who owned the house came out to watch. He just pointed at my trowel and said, 'You're putting too much mud on the frog, kid. It's squeezing out and making your joints weak.' I'd always loaded up the whole brick face. He showed me how to just butter the ends and the top edge, leaving the center hollow. My walls are way tighter now. Anyone else get schooled by an old timer on something basic?