Currently laying out the plumbing for a shower remodel. Plan is to have two shower heads each controlled by their own valve. 3/4 hot and cold supply available at shower wall. These 3/4 supplies also feed vanity lavatory on opposite side of the wall. Thought is to install a hot and cold PEX manifold from the 3/4 supply to three 1/2 inch feeds to the three devices. Plenty adequate water pressure and GPM. Comments or better ideas?