I'm currently developing my chair2bench and stool, mustn't forget the stool part, into a collection of simplistic yet functional seating options. I've developed my design to include arm rests which I feel is a neat little addition. This version will also fold out. I am also developing a version that doesn't fold into the bench and stool but will be much lighter and will include a cushion that folds out from the underside of the seat and back again. This would be ideal as a carver seat.
Still plenty of work to refine, but hopefully at some point I'll be able to get a scaled model mocked-up.