couple flaws i have noticed. 1 the new passenger cars derail really easily compared to the phase 5 amtrack cars. (15MPH around a 30 degree turn). second numbers on the right side of the BNSF SW1500 are Missing. 3rd the CSX SD40-3 when you change paint scheme it goes invisible specifically the YN3, YN3b. last but not least the Berkshire. when it runs out of water and coal it just keeps running anyway.
now on another note. suggestions. sense your dabbling into steam now. i suggest the big boy and the challenger steam locomotives. i will be happy to commission them if needed.