On the Hornby Pacific steam locos, in particular the Britannias, Clans, and the Bullieds the trailing bogie on the loco is fixed with a flangeless wheel set. This looks less than convincing when moving on model railway curved track under 3' radius or so.
Has anyone modified this bogie to be flexible so it swings with the track, presumably fitting the flanged wheels that come with it as a substitute for the flangeless ones? It looks like bit of very delicate surgery to me, or is it straightforward?
The Bachmann solution for their ex-LNER pacifics is to make the wheel sets swivel within the fixed rame, which seems a cleaner solution to the problem of large locos on 'train set curves' than the Hornby one.