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The BK2000 feels similar to the Star Trek one, but what makes it better is it's faster, and to light extra ball you have to chain at least two. I think that's better than doing 3 independent ones on Star Trek, which is too easy.
By the way, I just got my BK2000. When you're chaining loops, I often stop after 2 to quickly grab the extra ball because it only stays for such a short time (another better feature over Star Trek), but I wonder if the timer starts after the first 2 or after your last loop. Anyone know?