I received my Accurascale Mk2B coaches recently.
I ran into problems with them straight away, with derailments on curves and a constant whining noise.

In this video I diagnose the problems and test a fix for the derailment problem.

00:00 Model choice and appearance
02:59 Whining noise from the lighting
04:03 ABC compatibility
05:19 Details
06:50 Couplers and Derailments
07:10 Roco Couplers
08:45 Failure to Couple
09:30 Derailments
12:11 Testing on a Different Layout
12:50 Coupler Pocket Position Problem
14:54 Magnetic Coupling?
15:15 Fixing the Coupler Pockets
16:18 Conclusion
17:05 Where next for Accurascale?