I bought one of ebay and it's the same bin file as the one they sell on ebay in the states.
By my humble opinion not any better as the original RP58.
I bought some software, a programmer and a co device and around 8 different eproms to compaire the bin files and try them on my 2003R.
Found out that there are several the same eproms sold as different brands.
The best compliment for the small valve engines is to fit a RP58.
For the bigger valve ones there is not mutch to gain through an Eprom.
only my 2 cents