Originally Posted by kidDynomite

AFM has it nailed. Why move the weight away from the center line? The servo's heaviest parts are at the bottom and it makes sense to put a lighter reciever to the outside and knock off weight with less linkage and mounting hardware. Plus, it's likely that they have a cutout in the chassis to have the servo sit even lower like the RR Evo chassis. I'm almost positive that the Mugen Rx cover will fit. The stand up servo layout is basically based off the K.I.S.S theory. Keep it Simple Stupid.

Here's a couple shots from my old RR Evo with the Mugen cover. These shots were pretty much 1 yr before the RRR. It has since evolved close to the RRR and handles almost as great as my MTX4 and RRR. Weighs in at 1515g with fuel.