Anybody have any experience with these new tech 8 models? I have the old ones (2007) and they were great, stiff ankle, low height toe box (for easy shifting) leather & plastic. The ankle support is just gone now and they flex way too much. Seems the new ones have replaced the leather with some "microfiber material", are they still good and stiff in the ankle? Toe box looks a bit taller too from the pics too... Can hardly find any reviews online. Thanks for any input.