Hi Turast, it's okay except for uniqueness : if origami is okay, there would then be rival solutions, such as cut open the puzzle between rows 6 and 7, and splice in an extra row with an R in column 6.
There were 1 or 2 setters a few years back who favoured mutilation of the grid in order to produce some denouement or other. At that time my individual anarchism ("so if I just crumple it up and throw it in the bin, do I win ?") didn't go down too well with the prim ABers...