Gents, I suggest you get yourself a copy of Ray Prouty's books and read about this and other helicopter issues from an engineer's perspective.
What Nick and I are trying to get over is that the basic P of F from Wagtendonk and others is exactly that - basic. I was taught P of F and I have taught P of F to students but you soon realise it is just a convenient way of explaining what we know happens, rather than empirical proof that it does.
When a guy who was chief test pilot for Sikorsky tells you that these things happen for certain reasons, why don't you believe him? The higher TR provides a rolling couple to the right in fwd flight because it is above the C of G! (that is not rocket science nor secret test pilot stuff). You might not even believe me when I say that TR drift doesn't go away in forward flight either and helicopters sideslip constantly which still has to be overcome with cyclic.
Arm, if you look on Nick's diagrams you will see that the c of g is clearly marked and since the weight of an object is always deemed to act through that c of g why does it need an arrow as well? Just because it doesn't match the P of F book diagram doesn't mean it is wrong.