Thanks for your kind words, Tom !
I use a monopod when I have to approach a subject like deer. I can eliminate some blur, mostly up/down motions, however, not the lateral ones. So I am planning to make a ''bipod'' to solve the problem, even if it will be more complicated to handle...
Otherwise, attaching the monopod just behind the hood instead the gravity center of the lens (where the foot is) would reduce the ''pivot effect'', but it would be less easy to carry in the field.
Have fun with your D3x.