Minefield indeed ! ......... I was hoping to run my Esso 2672 with the three earlier Esso clas 'B' wagons Bachmann offered as a 'weathered' ( = oily ) set : 1231, 1855 & 1869 : they're all on standard 17'6'' x 10' chassis but the first should be a 1911 type wagon on 18' x 10'6'' frames ( otherwise not a bad model and should be possible to rebuild ) : the other two are numbered as rebuilt Air Ministry tanks 'class 'A' but, like 2672, the tanks are too small, they're cradle mounted rather than saddle, the domes, valve wheels, ladders and under-length platforms are in the wrong place ! With a LOT of work it should be possible to make them into ex Air Ministry Lube-Oil wagons such as 2305 shown on Paul's site - coupled, by coincidence, to the real 1855 and emphasizing the difference in tank size. All three tanks need the diagonal stays bringing outside the solebars .... anyone want to do me etched ends for these ?