The problem that I think is wrong with this machine is that the rods are angled. With the larger planes, it is hard to tell if any of the weight is transferred to the spring action created by the angle of the rod.

It seems that every time I got an erroneous reading, it showed it as being nose heavy which correlated to the spring action forcing the plane towards the nose. By having the rods straight vertical, there is no chance of this happening.

I discovered this problem when I tried the GP CG machine then hung the plane from the ceiling on string. The readings were quite different.

I'll bet this is MRC100's problem as his CG reading does not make any sense. I wonder why he has not responded?????

Just my opinion.

Paul