I wonder if it is too late for Lionel to correct the roof walk tradtment. The walks should extend further out from the car end, and the roof walk end supports look nothing like the prototype. The door guides are also a little heavy, but that seems the price we pay for sliding doors. For those that care, these features can be corrected. It would be nice if Lionel molded in a flat surface to mount Kadee's like MTH and Weaver- but it is not too difficult to add them.
I hope Weaver, MTH, Lionel, and GGD continue to offer scale oriented O gauges mass produced models of distinctive prototypes. For many years brass models were our only option. I plan on purchasing several Lionel X31's to two rail.
Ed Rappe