I bought the Havoc Pro 13.5 combo in July '09 for my XXX-CR and was initially quite happy for the first few runs, then the ESC started cutting out for no apparent reason. I tried everything to resolve the problem but it persisted. After doing a little researching on some of the U.S. forums it appears that the early batch of Havoc Pros had this glitch. Everyone was reporting the exact same problem. I have been in contact with Novak's tech support and they have instructed me to return the unit for a software update. Users who have done this say it has remedied the problem. I haven't sent the ESC to Novak yet so I can't comment. I really like the motor, it's dead simple to take apart and clean, and stators of different winds can be purchased for around 30 bucks to change the motor to your choice.... again a dead simple upgrade when you need it.
My only two pieces of advice would be to make sure you purchase a up to date manufactured Havoc, and to make sure you mount the ESC so that you can easily see the programming L.E.D.s
Hope this helps!
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