Also, we have no idea whether BGT's RMC will have OTSRs. What we do know is that for whatever reason, unnecessary Comfort Collars have been added to both Tempesto, Tigris, and Electric Eel.
We do have an idea, there is literally nowhere to put an OTSR on an RMC train (unless it’s a raptor type train in which that hasn’t been developed yet to fit the width of a hybrid). The shoulder peeks over the top of the train. You would have to make some severe modifications to the train vs just simply having a clip on collar on Tempesto.