I have notice that when I try to stop watching were I place my fingers on the neck I tend to have my left hand start slipping down the neck of the violin. I have trouble enough getting the positions right even with looking . I have marked decal on my violin which helps me find where I should be. buy once I look away like while trying to read the music I find I have slipped at least a half note off.
should I try to find a feel-able marking for where my thumb should be? stickers just slipped off the neck .