Thanks for the reply Flyboy, and that much makes sense to me. Is there any reason for the balance point to "appear" to change from the inverted position to the upright position??

Intruder - thanks to you also, your point makes sense and helps to explain the difference. It seems to be nearly an inch in difference - does this seem to be too much? Actually the test would be to fly it, right now it's just an interesting point to consider.