All up weight configuration and mounting location

[PeterLester]

Calculation methods are simple in concept but burns up time and are prone to calculation errors.....I just use a string... Once the MR is lifted and remains level in each of the two planes (horizontal then vertical), you have the COG for each plane. Then the common COG is the midpoint between these two COGs.

Out of curiosity.. is there a calculation for determining COG? I have yet to enter any of the x,y,z values.. and my bird flys straight and holds position fine. But I'd love to make it even more of a sure thing if possible.