Oh dear. Not having this Batronix software, I opened the "yl2.bin" file with MS Visual Studio. Opening the file as binary and scanning through the address locations.
If you do a search for "Revo", at address 0ffbc0 (hex), there's the text...
"(c) 2003 Revotechnik Patent Pending"
So if you have the hardware to read the chip, and save the file. Its quite obviously "detectable" that you've had/got "REVO" on your car.
BUT...its still less dectable than having a physical chip soldered into your ECU isn't it.
Also, on the physical chipping method, surely if you read the code from the performance chip, there's going to be something in there which says: "AmD" or "MTM" etc. Surely?
AL