Advice on using a laser for speaker positioning

I used a laser in setting up my speakers as well...Richard Vandersteen instructed me in its proper use. Here goes. First put your speakers on carpeting (fuz side down on wooden/tile floor, and waltz the speakers around the room to find its best resting spot. After the speakers are spiked in position raise/lower the fronts for desired sound, making sure both speakers have the same degree up/down. (now comes the laser). Put the penlight laser on the top of the speaker shinning forward. Do not point it to your listening position, but rather, slowly turn the laser left/right keeping the laser solid against the top of the speaker. Place a yellow "Post-it" behind your normal seated position. Using a marker, place a dot on the post-it right where the red laser dot hits the back wall. Do the same thing to the other speaker...chances are very good that the laser dot will be higher or lower than the marked dot on the post-it. Raise or lower one or the other speaker so that the laser dot superimposes on the dot on the wall. This may seem tedious, but well worth the effort.