Here is a close up of the string linkages on the Briz 2000G. If you look carefully you can see the switchable change valve
Here is the Briz 2000N with Minibar linkages. In the forground and slightly out of focus is the adjustment screw for the adjustable thumb trigger.
Most models can be made with sting or minibar linkages. There is additional cost associated with minibars/mechanical linkages due to additional time for assembly and adjustments. They are very elegant and easy to operate.
Great thanks to ConvexPhotography for these fabulous pictures.