Flashing a drive has become a nightmare

[MattyB]

Please, help...
Im at the point of banging my head against a wall.
About to leave on vacation to FL and trying to get this done before I go.
Im trying to flash my stupid BU40N drive. Ive tried multiple firmwares (1.0 and 1.03)
Keep getting the same "Checksum is Mismatched error), Ive read multiple forum post where people have the same issue but there is never a response showing any significant help.
Mostly responses like "Hey, Your doing it wrong", which is obviously not helpful.
Please someone that is willing to assist help here.

[Coopervid]

Please post your Makemkv status information. Are you using the SDFFlasher tool? Then first flash the SAME version of your current firmware version using "enc" if it is encrypted. Let's get started....

[Billycar11]

Please, help...
Im at the point of banging my head against a wall.
About to leave on vacation to FL and trying to get this done before I go.
Im trying to flash my stupid BU40N drive. Ive tried multiple firmwares (1.0 and 1.03)
Keep getting the same "Checksum is Mismatched error), Ive read multiple forum post where people have the same issue but there is never a response showing any significant help.
Mostly responses like "Hey, Your doing it wrong", which is obviously not helpful.
Please someone that is willing to assist help here.

If your in a rush and need it flashed now and don't have time to read the guide buy an automated flasher from me or Marty