Thank you for you comment, I wait my Ritchey Fork Carbon WCS and change my Schwalbe Nobby Nic 2.4 & 2.25 for Conti Speed King 2.3 Supersonic (light weight)
for you question: I configured the command in the alignment of my arms, not having cramps at the handle, I drive in this position, it's very good for me.
Also, I was advised to take the shiffter XTR who work in two ways compared to shiffter XT