Originally Posted by krakout
Apologies, not sure exactly what you mean... you mean I can flash that FW on my HTC-ROM device as well with no problem?
If you updated by OTA to 4.4.3, the latest firmware is already on your device, and you need not take any further action to run 2.xx based Sense ROMs.
You can verify by looking at hboot and baseband on the bootloader screen. Hboot should be 3.18, and radio baseband should be 1.19. If so, you are on the latest firmware.
Also, in general OTA will include the firmware what matches the OS software contained in the OTA.