hmmmm, says the layout has to do with the natural position of the hand..
"The buttons were spaced to contour to the right hand when in a relaxed position"
Guess it depends on which planet you're from


Seriously though, in all fairness to Greg, he does explain his button layout on his site (for example my partial quote stopped right where it says buttons 1 - 4) Plus, it's his cab and if it works for him - more power to him. I do like that motorized rotating monitor with the auto degaussing, pretty clever