Ok. First experiment with the ZX:
Tried it out as full bed (Red) at 57 lbs in my shortened, leaded-up NXG OS (specs of about 13.6 oz., 12.4", 360 SW).
Stringing the 10 central mains was a pain - I was concerned that the strings were about to snap at any moment, as the dropweight dropped awfully fast and violently whenever I released the clamp.
Unfortunately, this stringbed turned out to be one of the worst performing stringbeds I've ever tried.
Adjectives: springy, powerful, slippery, unpredictable, inconsistent, hotspots.
Hitting against the wall was a frustrating experience. Trying to hit a series of topspin drives in a row at the same target was difficult. Sometimes the ball would respond with the spin and angle I expected, and other times the tangential friction would be converted into extra rebound angle rather than spin, and the ball would shoot off at a high launch angle with extra power (a ball that would hit the back fence if I were on the tennis court).
I think the ball seemed to slide across the stringbed without grabbing on softer shots, but it would grab better (but still unpredictably) on harder shots. This was the most unpredictable stringbed I've ever tried.
Volleys were just as bad - I could not control the rebound angle very well at all, as the rebound angle seemed to be dependent on how much spin was incoming.
The most similar comparison would be to full poly that has dropped too much tension (this happened to me with my NXG when I tried full Lux ALU Power at 52 lbs - the first hour I played great, and then after that the stringbed became unpredictable and unplayable). But the fresh ZX was even worse than that. The only time a fresh string was this bad was when I tried Hyperion at 40 lbs in the O3 Red - way too low a tension for the O3 Red.
Anyway - I still have hope for the ZX as a cross with kevlar main (that might hold tension better than poly?), but I cannot recommend this string as a full bed for any type of player. This was awful.
As an aside - I compared it side-by-side with the frame in my current setup. The SPPP tension had dropped a lot after about 4-5 hours of hitting, and although the stringbed is still adequate, the differenntial tension loss vs the kevlar has squashed the frame enough that the MgR/I is too high now, and the frame is no longer tuned right (coming around too fast on both forehand and 2hb). I suspect the swingweight has dropped from 373 to around 370 now due to this effect. So I'm losing my patience with poly crosses!