I replaced the step and counter-flashing around my friend's two chimneys. The reglets on the step flashing are set into the mortar joints by 1 inch. The caulking is Sashco Mor-Flexx. I also built the cricket behind the larger chimney to divert water away from the back of the chimney. This was my first time. There are some things I would do differently next time, how did I do?