Knee that is, left or right?
As stated in my introduction, I'm an old bloke and a new student. I use the student rather than player description carefully, if you sat with me when practicing you'd know why. I've been resting guitar body on left knee and left foot elevated on a low block giving better view of left hand as required, I think this is classic guitar style (left knee, not the looking at left hand). Problem is I've had both shoulders rebuilt after a lifetime of accumulated motorcycle crashes and after a short time practicing my left shoulder aches. I'm trying to change over to right knee, this is easier on the shoulder but I find my guitar neck seems to move about, whereas the instrument is secure when on left knee. I suspect persistence on left or right will resolve the issue but not being a natural player makes me want the best external forces working. Positive comments most welcomed.