I have a pair of older 180 Explosivs(like 8 years old) with the boot tip mounting line and they are pretty much identical in size and shape to the newer maroon Ex's. On the newer maroon Ex's in a 180, Volkl suggests mounting with the mid-sole at 73.5cm from the tail. I had to mount my older Ex's with the mid-sole at about 73cm from the tail due to the old drill holes, but I find that my boot tip(312mm sole) is about 2~2.5cm forward of the old boot tip mounting line. Seems to me that from the older Ex's to the newer ones, Volkl has moved the mounting point forward 2.5~3cm.