The Oxford Radial has 2mm driving axles and 1.5mm bogie/trailing axles. Oh, and initial ones came with pizza cutter flanges!
Now, the driving axles revolve in nice brass bushes, but if they are lifted out, you are left with the cast chassis slots a perfect fit for 1/8th axles with no slop.
The bogie is a plastic moulding, so opening the axle holes out for normal 2mm axles is straightforward.
The trailing axle slot needs a slight bit of work with a file to take a 2mm axle.
Otherwise, its straightforward, mine runs very well.....(Gibson wheels from the standard range)....might not have sexy brass bushes, but its no different to earlier Bachmann chassis with axles running directly in the chassis block.