Brake controller for controlling the brakes of a towed vehicle is provided. By tailoring the packaged tag and electronics to accommodate existing ordinance body cavities the integrity of the bomb casing is maintained. To enable routes associated with nodes on the Rbridge network to be distinguished from routes external to the Rbridge network, messages may be transmitted between the portals. The method can include depositing a second conformal dielectric layer on the first conformal circuitry layer, the second conformal dielectric layer conforming to a non-planar surface of the first conformal circuitry layer, and applying a second conformal circuitry layer on the second conformal dielectric layer. This system transmits power to the PTO shaft from both the engine and from the variable speed drive unit.