Speaker Positioning


I know from speaker position is critical in achieving the best results from a given system. Is there a dynamic way to measure placement of each speaker to make certain they are the exact same distances from back/side wall, cabinets, seating, etc. beyond a measuring tape and listening to the results? Seems to me if minor differences pay large returns, you could be tinkering with this a long time.  Thanks for the indulgence.  
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If you go to the Cardas site it will show you the Golden rule how to set up speakers that will work in any room. If you use the formula it will give you the exact spot from the back wall and the side walls where to put the speaker and I've used it and boy to my speaker sound great now.
Exact measurements become irrelevant when you don't have a bilaterally symetrical room. My system is in a 'sunken' living room. Right side has a large window behind the speaker, and a very large picture window to the right along the wall. Left speaker has an opening, some day a window, otherwise a long drywall surface. So not equivalent. The room opens to a dining room, staircase, etc., so no reflections to deal with. But speaker placement has to be done using the ears, not a tape measure, at least in this case. 
I found much better sound as I inched both speakers away from both the back wall and the sides... Just trust your ears!