@Yves posted:These O scale units were produced long time ago and will (most likely) never been produced again.
Only 110 units in O-Scale were manufactured by Westside. They are very poor runners for most of them and I have published a five parts article describing the restoration of one of them, in O-Scale Train magazine: https://oscalemag.com/current-issue/ if you want to know more about the idiosyncrasies of these models.
Yves
I ordered both magazine issues this morning to see what was done. I am looking at modifying both my engines gear boxes. Maybe go to a single shaft drive...time will tell.