Nick Ridgway
I have filed the insides of the bogie frames for mine because it doesn’t bother me and it fits my ham-fisted, cheap-and-nasty approach. If this isn’t desirable, then consider a swap-out of the wheelset for a Gibson one, available from the Trade Officer, as these have a narrower tread relative to Bachmann ones.
Over time I have built up a range of metal wheelsets in by Glory Box and the variations between them are startling, despite most being compatible with trackwork built to EM standards. There has been some correspondence on this topic of late and a trawl through recent Newsletters will find it.