A: The term 5×7 means an instrument which has five bass strings and seven melody strings. Because we’ve chosen to maintain modular design principles using only standard parts, we’ll stick with six strings in a string group, because there are so many pickups and bridges available for six strings.
I don’t know what ‘left-handed’ actually means in this context. I’ve never seen a left-handed piano, and since you have to train both hands I’m not sure there would be any advantage in building an identical instrument where everything was reversed. We do not plan to build any reversed instruments.
If you’re determined to have some variant instrument, perhaps a custom-made instrument is for you. Skillful luthiers around the world can hand make instruments, often in the $5000-$8000 range. Our ’semi-custom’ assembly is much more dependent upon standard parts.