S928B mmWave antenna Mod

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Guys I'm thinking about swapping chassis with the 928U1 since it supports mmWave. The U1 chassis is basically identical to the B model just has a larger slot for the mmWave antenna. I was just wondering if anyone has ever tried doing this? I know a couple years ago someone did it on the S22 ultra. Would I face any issues with modem or need a custom kernel?