So they haven't laid it out for sure yet, but after watching the videos the Lx series seems to be best suited for Low rev players, Mx for Medium, and Hx for High. not sure the meaning of, or if there is a meaning of the "x", but it seems the number is the int. diff.
Don't know if it's old news or not, but I like the new track T. Traditional yet updated. Nicely done.
Matt