Custom Service and Bluetooth Qualification process

Hello,

I would like to know if using a self made GATT Custom Service in HID Device (NRF Desktop App) can incur additional costs during the Bluetooth qualification process. It is a kind of button service, similar to the (LBS) LED Button Service, but for multiple buttons without LEDs. What consequences can a custom service have for the Bluetooth qualification process in general? 

Thanks!

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