I drilled a Hammer Axe. It is a 3 piece ball (not 3 piece pancake) with a "low friction reactive" cover. I put it on the Haus machine and let it run for one minute on the diamond cutters. I have thrown this on slightly used THS. In that this was a 3 piece ball, I used the same layout as I do on my spare ball, 5/8th positive and 3/4 thumb.
I can also see why this can be an effective alternative to urethane or other slow absorption balls. The Axe, at this surface, reads very early and makes a very gradual move to the pocket. It does provide that very slow response, control type of motion that urethane offers. The photo shows, as expected, how little track flare there is. I will want to do a little compare and contrast against the new Purple Hammer 78D and an original Purple Hammer to see the exact differences. One thing, in all honesty, that I did notice and this is probably a function of 3 piece low friction reactive v. 2 piece urethane as well as being older with a declining rev rate, the ball definitely is "quieter" going through the pins and doesn't get the light off hits as effectively. Personally speaking, for me to get the Axe to work, I need to be higher on the headpin in order to see effective and consistent carry.