So $595 for a painless harness, and $600 for a nelson harness. Painless gives you a free "tune" to get you up and going, but you said you might need a real tuner to tune for your mods. So what's the difference I guess? Seems like it's the same price, not to mention the fact that Nelson can get you up and going instead of relying on a "tune" from a company that does not specialize in tuning.