Basically, even though the Low Point Plane Line is located on the same Inclined Plane as the Impact Point Plane Line (the one we usually Trace), from the player's perspective, that Low Point Plane Line looks like the Impact Plane Line, hence we have a devastatingly bent Plane Line. The way to break through this illusion is to realise that you are Tracing a line which is under the ground. But why go through all this effort I wonder. Just use the basic Plane Line.
Well....
Tongzilla has been able to articulate eloquently what I have not been able to...his post here says exactly what I was trying to say!!! Thanks Tong!!!
Let's leave this sit and incubate for a little time...and then come back to it...my brain is fried!!!