I think the only real answer is to practice everything all the time. You can strike me off the list of people who do!It's heartening to know that my fellow esteemed and much more experienced and talented forum members find the lower notes more of a challenge. I guess it's all relative though. I've been practicing overtones recently and I find it really hard to get back to the fundamental note after I've played a couple of overtones up the register. I also find sub toning the lower notes is often easier than a full on note. It's the start of the note I struggle with when I'm going for a fuller tone. It's often starts off with the Octave above before I can find the "correct" note I'm looking for. Needs more practice..