Original FW have checksum FE, but when i changed to version 3.11 then angelo have 0 or 65535 instedad of version 3.11 also checksume changed.
I try and try but can't figure out how to calculate checksum to be after modifie again FE.
Maybe kunix, Giomen or some others know how to calculate checksum to be again FE, but then maybe GTM wont update older FW anymore.