Who did the original tune? For something so simple as that, most tuners will simply do it and not charge you or charge you so little that it's not worth buying a hypertech. Also, what are the turn on temps? I find a lot of people want a turn on temp set at an unnecessary temp. To answer your question though, I wouldn't do it. I don't like the hand helds because you don't know exactly what it's doing.
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Trey
Current ride: 2001 BMW 540iT soon to be manual swapped.
Former rides: 1979 Trans Am WS6: LT1/T56, Kore 3 C5/6 brakes, BMW 18in rims
00 BMW 540i/6: Suspension, wheels, and ACS bits.
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