Straight Edge Guide for Hitachi Router (woodworking)?

What I do is simply plunge the router into one end of the line you intend to cut, and make a fine pencil line on one edge of the base. Then plunge it into the other end of the line and turn off the router. With the router bit still in the hole, lay a simple straightedge from the router's base to the penciled mark and clamp it down on both ends. Then route away. The straightedge can be just about anything -a plywood scrap, hardwood, iron or aluminum extrusion, or a yardstick. Just eyeball it first, to make sure it's not warped or bowed, and it'll work as well as any high-priced factory-recommended accessory. Be sure the router's base stays in contact with your straightedge during the entire cut. Letting it wander away is a common beginner mistake. Depending on the wood and grain, it may pull from one side to the other.