A one-piece, monolithic tile support mount attaches to a roof and provides rigid structural support for a lateral attachment bar or L-foot that is used to hold a height-adjustable mounting mechanism or mounting rail, which is used to attach solar photovoltaic panels to the roof of a roof covered with roofing tiles. A custom-designed, sheet-metal or polymer, aperture-less replacement tile is mounted between the lateral attachment bar or the L-foot and the tile support mount. Also provided is a compact, magnetic positioning tool that provides proper alignment of a drill bit when drilling or punching holes through the replacement tile.