What is the significance of Roland producing the V-Accordion, a digital version of the accordion?

As the world's first accordion with a modeling sound generator, what are the advantages of the V-Accordion?

I understand that the V-Accordion allows me to mix and match the reed sounds, something that is impossible with an acoustic accordion. Can you describe how this is done? (FR-7 / FR-5 / FR-7b / FR-5b)

How is the V-Accordion's PBM sound generator different from conventional sampling sound generators?

How does the V-Accordion’s playing feel compare to that of a conventional acoustic accordion?

What are the individual weights of the BAG/FR (the dedicated carrying case for the FR-7 / FR-5 / FR-7b / FR-5b and the BAG/FBC-7 (the dedicated carrying case for the FBC-7 foot switch and battery charger)?

What type of battery does the FR-7 / FR-5 / FR-7b / FR-5b use? How much does the battery weigh?

The V-Accordions are all-digital instruments. What are the main advantages of a digital accordion over an acoustic accordion?

How long will the FR-7 / FR-7b run on its internal battery?

I would like to play the FR-7 / FR-3s / FR-7b's sounds from a PA system. How can I set the volume of the PA system to prevent acoustic feedback?