Interesting post. When I started writing with flex nibs the right tine was higher than the left after some writing. I do not hold the pen square (bad habit) and being right handed, while the nib is on the paper the top of the pen is to the right of the nib, e.g putting more horizontal pressure on the right tine than left. That turned out not to be the problem as I still write like that, but I realized that in addition I slightly rotated the pen on its axis to the right also. That was the part that was causing problems. Without concentrating I started writing and then after a few words would freeze. Then looking at the nib I realized that the breather hole was turned to the right slightly. That was the real problem. Not only putting more pressure on the right as it moved up and down, but also adding slight pressure on the vertical axis. So as I pick the pen up I started forcing myself to rotate the pen to the left a touch before putting the nib down. It must have taken only about a week to make it a habit and didn't have to think about it. The difference it made was enormous. My upstrokes always had a little kink in them and skipped, I realize now that the pen was rotating on the axis while i wrote. That's cured, and also the down strokes are much more even and consistent. The top of the letter I or t for example start at the right width and stay even all the way to the bottom. (I couldn't do that before). Putting pressure on one nib over the other in a horizontal motion wont damage the nib if you are not excessive, but putting horizontal pressure on it and vertical is a recipe for disaster. I check all my nibs occasionally through the loupe at the tips and they are always good now.
It may not be the same for you of course but in case it is, then I wanted to share my experience with you in case it helps, without correcting that, my writing would not have got any better no matter how much I practiced.
I have kept examples to measure against as I try and improve, as you can see my writing was terrible, its better now, or even at least.
Edited by ainterne, 07 February 2015 - 04:02.