Layout suggestion: Take the left probe and the right probe to the right, and then open the mirror key position as close as possible from the fire key position, so as to ensure that the right thumb can reach the fire key position at the moment when it reaches the mirror key position, climb down along the key position and move to the upper right of the direction key position.
When you worship Buddha in melee, you must be able to ensure that your left thumb can be pressed instantly.
This layout can maximize the upper limit of two-finger operation and the operating space of melee gun.