Firmware upgrade for pre-2025 K1C

Hi there, does anybody know if there is a special bridge firmware to convert a pre-2025 K1C form S11 to S12 firmware to allow the K1C to install the V1.1.0.27 firmware for the CFS-C system? If there is whee can I find it? There was a thread on here the had a “special file” but it was for a K1 Max, the parameter settings in the file won’t work on a K1C as the build area is much smaller than the Max.

I know on the Creality’s website there is a file for the multi-color firmware CR4CU220812S11_ota_img_V.2.3.5.34.img but I have been told that that file is not bridge firmware file I need to flash my S12 mainboard that has the S11 firmware on run the the S12 firmware which then allow my printer to install the required V1.1.0.27 firmware to run the the CFS-C system.

Is there anyone here that has done this with success? Will you be willing to assist me with this transition?