To each his own, but this works for me! I prefer to install my hinges during assembly, but I don’t glue them.

          I make my hinge slots where appropriate, insert the hinges, and, if necessary (such as when using quarter-scale pinned hinges) tack glue 1/16th or 1/20th balsa spacers.

          Now go ahead and build your wing or tail feathers, including the sheeting. Do all your sanding, and then finally carefully cut along your hinge line and take the parts apart. Oh yes, hopefully you marked the location of the hinges and the hinge line on your plans as you went along so that you know where to cut!