I keep reading about tunes and have glanced at tuners like the Tuneboy and Tuneecu. However, I was under the impression that these cost $500 - $600 and up. I figured you folks tuning your own bikes must have some dough ($$$$)

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Now I'm understanding Tuneecu is a FREE program and all I would need to purchase is a cable to connect a laptop and I'm good to go? Is this the truth? If so, can someone provide more details and a link(s) to exactly what I will need? Thanks!