If i play a chord with my little finger on a black key, my wrist stays straight and my elbow rotates awat from my body. This feels easy and comfortable.
But if i play a chord with my thumb on a black key, i can't rotate my elbow inwards because my body gets in the way. The 'natural' thing seems to be to twist my hand at the wrist rather than keeping it straight. This feels like a relatively difficult motion that is full of tension. The alternative seems to be to keep my wrist straight and to push my finger right up the keys instead. Since my thumbs seems quite short compared to my fingers, my fingertips go right up the keys so there isn't as much leverage. This means that the hand position is relatively comfortable but the sound isn't that good because its harder to control the keys with my fingers so high up the key.
Should i persist with hands high up the keyboard and just practise, or is there an alternative way of dealing with this?
In typing this, i notice that my left thumb is 5mm shorter than my right.