In openTX world, you can clone a TX/model. It copies over the bind data. If you have a multiprotocol module, this can even be done with DSMX. Not really the safest way to handle sharing a model because at some point, someone could fire up the other TX, and at that point, it's anyone's guess as to which TX will be in control.
I would prefer to bind it to the radio that should be in control.
LB