Wont be searching until end of January after Troy Bayliss Classic, as the rest of the RM ABCs are on top of racks 10 feet off the ground
From blowing up the Trophy photo the cable guide appears to be a C same as second photo on Facebook page
Personally I think your arm or any C arm made identical is legal and no advantage, as I said in the beginning as confirmed by Alan Craig, the optional arm existed, its in the parts book and its legal, Finished you proved that,