I've made my own for many years. I use a material a little heavier than the kits. Usually I will customize it for the application. As many holes as desired, 4 or even 5 for ride height adjustment/tuning. Move the holes forward, This will help weight distribution, also if going to a big tire moving the housing forward allows you to modify just the front of the wheel opening and leave the back original. Or leave the housing in the stock location. I have never moved a housing back.