It's not recommended to upgrade your CID to 53, so use the latest CID52 firmware. In order to debrand, you should use a "generic" firmware, which means:
T650_R8BC004_MAIN_GENERIC_SN_RED52
T650_R8BC004_FS_YOUR_ZONE_RED52 and the right custom file
HB1-06_Gen_CDA102568_..._GENERIC_YOUR_ZONE