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When you say upgrades, please clarify. A device like the SCT Xcalibrator can be locked to a vehicle and unlocked up to 5 times, hold up to 3 tunes at 1 time (you can have many more saved to your computer and changed between them). In terms of upgrades, a custom tune on a handheld is no different than a custom tune using a direct flash like HPT, etc so the upgrades would not be limited
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