Very interesting read thank you! Re problems with pony / bogie derailments, I have either added a fibre washer under the screw head to reduce vertical movement of the bogie or introduced a very small piece of roofing lead, just a few grams, to the top side of the bogie, which adds to the downward weight of the bogie.
I’ve found both methods considerably reduce derailments.
Very interesting read thank you! Re problems with pony / bogie derailments, I have either added a fibre washer under the screw head to reduce vertical movement of the bogie or introduced a very small piece of roofing lead, just a few grams, to the top side of the bogie, which adds to the downward weight of the bogie.
I’ve found both methods considerably reduce derailments.