I currently run the rtr Polar Express freight set 30184 with the upgraded P.E. engine that features the steam whistle effect. After reading the features of the forthcoming POLAR EXPRESS SCALE N5B CABOOSE #1402, I'm tempted to have that at the end of my P.E. rtr freight set consist. My main concern though is that since the N5B is a scale caboose,  will it look too big and out of place to substitute the traditional size caboose that comes with the rtr set with the scale N5B? To make the decision more difficult, while I can measure the length and height of the caboose furnished with the rtr set, Lionel gives no height and width measurements for the N5B. So, what's your opinion - would the N5B be a passable match in appearance size-wise or weird looking because of size discrepancies with the engine and other traditional sized cars of that rtr set?