I need to gain access to a hidden toilet cistern by creating an opening thro a stud wall. The cistern is in an ensuite (in a loft conversion) and because of the layout etc the only feasable access would be via an adjoining stud wall shared with the bedroom. This is a stud wall with plasterboard that has been professionally skimmed.
My idea is to create the an opening between two studs and one noggin above so that the opening is framed by a rigid structure. That way I can hinge an access door off one of the studs.
My question is...... How can I get a reasonably neat edge to the plasterboard without having to fit a a metal trim bead and get a plasterer in to re-skim the edges?
Any guidance would be much appreciated.