I do like the RK Box, but is still quite heavy to move around. However the closed back + open back design is great, that is what i want to keep with my new idea.
I think with the widebody closed + open back it can be even better. It was specialy designed for the Mark V. (front ported)
I will also have the versatility to use it as a combo with the open back for some small pub gigs or for home practicing.
thanks for your opinions