My B came with the Logos Cutout under the Receiver box and Tank, and isnt that old (May), but Im not worried about that.
Honestly, not worried about the weight, this car is actually converted to elec with the AE kit, but on a B car.
Retail on the B chassis is almost 2x that of the RTR chassis, and if all that is different is a ounce or two, Im not too worried about it.