well it's not that hard to break off fins on the Go tech cooling head as they have lightened them a fair bit. I don't know wheather they have upgraded them since I brought mine as I've have mine for quite a while (it's done about 9-10 gallons and is still on it's original internals).

I have actually had fins on 2 heads come loose the original gold head and the silver 5port that i replaced it with, I also know of at least 8 others that have had the same problem.

As for my driving I'm currently ranked top 10 in my country