[ikrom]

The Winols 156C is a Gen1, 1536kb, is the size for this type of units. On bench normally.

Thanks for your reply. Are the tuned files are in BIN format?

Also why you mention bench, can it not be done via OBD using Kess (it has option for writing for that TCU - hardware model = 0B5927156J )?

The info from OBDeleven;

System Description = 0B5 20TFSIRdW
Identifier = J217
Hardware Number = 0B5927156J
Software Number = 8K9927156C
Software Version = 0005
Coding = 000001
ODX Name = EV_TCMDL501021
VIN = WAUZZZ8T3EA013405

both tuned files are in bin. not frf.
you can just write in bench. Only thing - they are for same HW, but size is different. To choose right, just read you TCU in bench, and see what size will be flash. then write tuned file with the same as ori size.
If you upload ori from tcu, i can check and help you to configure also second tuned file (which will be different size, not as ori).