> which is just the right distance away from said wall (based on the projector's throw) and at the correct height and ideally centered to the viewing area I bo

> which is just the right distance away from said wall (based on the projector's throw) and at the correct height and ideally centered to the viewing area I bought a relatively cheap one around a decade ago, and this is adjustable on the projector itself. It's not nearly as difficult as you make it sound.