These hopper wagons are beautifully detailed and look great on any layout. My only criticism is that there is quite a lot of sideplay on the axles in the bearings which is a bit disconcerting.
All my wagons were converted to absolute scale 33mm Scale 7 gauge which was done two ways. First, by turning the wheels and flanges to Scale7 standards and second, by fitting Slaters Scale 7 wagon wheel sets. Both are valid ways of improving these wagons to be fitted with wheels of the absolute correct scale dimensions.
If using the existing wheels sets in either O gauge or Scale 7, fitting 2.5mm hole brass washers on each side can solve the excess side play criticism.
Just go out and buy them while they are available.
Well done Accurascale!