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Disclaimer: Aces EFI is an Engineering and R&D driven company and as such, we are constantly working to add new features and improve upon existing features in our systems. With this being said, every update we release is not a recommendation to update your system as the vast majority of updates are often for specific features and specific systems, and they may not apply to the system you have. Even in cases where we have made what we call improvements or optimizations to parameters and calibrations, these are not typically changes that will impact the driving/running experience to a noticeable degree. They often have no impact on the vast majority of applications. However, there are of course applications in which your system would benefit from the update, and this is why we encourage you to use discretion and reach out to our team if you need assistance in determining whether your system would benefit from the update. When you update your Handheld to the latest version of firmware, it may include updated calibration files for the system you are updating. If this is the case, it will require you to upgrade your ECU Calibration as well after you load the new Handheld firmware. When this happens, any previously saved learn data will be erased and you will need to redo your start wizard and let your system relearn. With this in mind, we recommend backing up your tune from your system using our USB Data Cable (AH2500) and Laptop Tuning Software before you upgrade your Handheld Firmware. You can then reload your tune back into your system with the software after the Handheld and ECU have been updated.