Since it's a new class, we are trying to keep the class as tight and similar as possible - as a result, we are, for now, only allowing a straight chain drive (no diffs, no FNR boxes) system. We are only doing this to get this class started on the right foot - again, we are trying to bring back a true driver's class. The only way to do this is to make sure that every Rhino is as close to exactly the same as we can get, without requiring them to all be built by the same company or have the same year motor, etc. Will a gearbox make that big of a difference? Maybe not, but if we allow FNR boxes, someone will want us to allow diffs, too. If we say OK to that, someone else will want an RC51 or Hyabusa motor, etc. etc........and there goes the whole point of the class.
If you look at spec classes such as LOORRS Superlites, or the Trophylite classes, these are classes that are attractive to racers because they know that every time they go out on that race track, they all have the same machine - and they all have just as good of a chance at a podium spot as everyone else in their class - the only thing making that difference is their driving ability and luck.
This is our goal for the SR1 class, and to at least make a genuine attempt at reaching it, we will have to be very strict about the rules - at least initially, until we can give the class a good headstart in the right direction.
I hope that makes sense......