A certain trainer

Does anyone know where I can find a trainer that would enable me to put trains on a coaster not of it's own type?  I think I saw one a while ago.  I think it was CES.   Any help would be appreciated.  

I think you might want to try out the Beast Trainer. Speaking of the Beast Trainer, anyone else anticipating(S?) version 2.3 as much as I am? I want the thing out now. I want to know at least what the new features are.

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Creator of the 4D Impulse Coaster.

DragonsIOA allows you to use trains from one type of track on another,as long as the track guage is the same.