Quote from: EK Growler on Yesterday at 08:05:38 PMI've had issues with EFE Rail JIA wagons.  The wheels bind on curves.  I've found how to fix.  The link takes you to my YouTube video showing how to fix.
https://youtu.be/Gku4F7Z7VQQ?si=rzoBwYjKpZqffUH9

Good explanation of how to fix this problem, I did the same with mine about 12mths ago, made a huge difference.

Playing Devil's Advocate, would you say that's a design fault or a track radius problem?

definitely a design problem in my view. When running them on the straight or large radius, over 750mm radius they worked absolutely wonderful, anything less and they came to a standstill.