While I am loath to argue with Tony about this, I find no evidence or mention of roof replacements to the WP 15001-series boxcars. I have copies of several of the general arrangement diagrams for cars in this series, including the 26001-series in plaster service, 8051-8055 (the last in general service circa 1947, see below), the 75001-series stock cars (which had "single-board" roofs, suggesting the original steel claddding was removed), various cars converted to MW service, and numerous photos in my collection and in several WP books. None offer any indication for roof conversions except the stock cars. I can't say it didn't happen, but I will remain unconvinced until somebody finds photographic or documentary evidence.

The 8051-8055 group should be of particular interest to Fred. The general arrangement drawing was reworked 3-28-47 (only the car numbers were changed). These were apparently the last five such cars in general service, if indeed they actually were still in use. I have the WP July 1949 ORER sheets, and these cars are gone from the roster, as are all the 15001-cars. The 8051 series apparently had a very short life with those numbers.

I suggest the Accurail roof should be sanded smooth and Archer seams added. The car is way too tall to be even a good stand-in (they had just an 8-foot IH, and were 12' 10" and change at the roof peak), which was why I disposed of my examples long ago.