I had been wondering what differences there are between the 15X and 15DX that would account for the $100 difference in the original price.
It never occurring to me it was the physical size until I saw this
picture.
My 15DX is 4' tall and comes up to just below my chest (I'm 5'11"). So unless Ron is a giant, the 15X looks to be a little over 3' tall.