I'm the same...I never did anything with any of the Infernos, but put the Zone MB core in the Activator/+ and I could do no wrong. I would not mind to see the Activator+ on a ball in the BVP line, but not on a Inferno-esque core...that's the reason I ended up not drilling the Smash Zone I had. I really wanted to try the Enmotion, but not with that core.
I'm not saying it was bad, heck, it was the most popular ball lines ever! Just not for me, and I tried many of the Infernos. Had 10 different ones, with different drillings, but gave up after the Intense.
I did however do very, VERY well with my old Danger Zone, Time Zone, and the whole ProActive line. Would love to see some more PK18 and Low Load Particle balls. I loved the Sidewinder, and really want to drill up an Ambush, but the chances of finding one aren't great...
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I need more revs...and more weight. I mean, 15# is fine, but 135# doesn't do me any favors!!!