I got out my book "CABOOSE" by Brian Solomon and John Gruber ,PUB MBI International. Low and Behold the cover photo taken in Illinois shows one of the Q's wood cabooses, also a Wabash Santa Fe Style Steel Car. The Burlington cars had four side windows, not three,their body leingth might be slightly longer, some had four pained side windows, some did not. The cupola ends and sides are metal (tin?) the photo shows the paint peeled off exposing bare tin, (over wood?) some cars had single cupola side windows others did not. Biggest difference Burlington like Union Pacific uaed wood beam passenger car trucks under their cabooses for smoother ride. I have used Bachmann old timer passenger car trucks inder my MT and Con Cor / Trix UP wood cars. The wheelbase looks longer on Burlington cars, maybe the MDC express reefer truck would work. End ladders are also different, there are turnbuckel braces to cupola,cupola roof is more rounded (curved) but the Athearn car would still be a good start. Photos hopefully coming later this week when my friend Bob Gilmore brings his camera down. Nate Goodman (Nato).