I had a problem with one (hornby steam) loco going over a curved settrack point. It always managed to derail the front bogie if it was going one particular way.
I re-laid the track, replaced the point with another brand, checked the back-to-back (again), with no joy.
I then added a little bit of weight to said bogie, and all was solved.
to add the weight, I removed the bogie from the loco, and made a mould from modelling clay. I then mixed fluid lead and PVA glue, poured into mould, and let it set. Total weight is a few grams, but the difference is amazing - not one derailment.
I re-laid the track, replaced the point with another brand, checked the back-to-back (again), with no joy.
I then added a little bit of weight to said bogie, and all was solved.
to add the weight, I removed the bogie from the loco, and made a mould from modelling clay. I then mixed fluid lead and PVA glue, poured into mould, and let it set. Total weight is a few grams, but the difference is amazing - not one derailment.
