In the past I have built many FT planes and designed a few as well. I use liquid glue almost exclusively. Often I have in construction upto 6 models at the same time and as you can imagine without some form of assistance, clamps or similar the results could be rather variable.
Anyone who builds using FB has offcuts or scraps. Well I make FORMERS for my models out of the offcuts. For a fuselage I would cut a piece to the internal dimensions of the point I want to hold in shape and then cut a piece to fit over the same point.
Then I allow the glue and fold up the piece under construction. Fit the internal former and slide the external piece over the job. If necessary I use a little tape to hold the formers in position. When the glue is dry I remove the former pieces. If undamaged I can use them again next time and if damaged it is no real loss and I can make replacements if needed in the future.
A similar approach can be undertaken when trying to glue the tail members onto the craft to ensure that everything is properly aligned and square.
Here are a few pics for one of my designs which show the use of a FB former to aid in the making of a FB hatch.canopy of a curved shape.
Just what works for me!
Have fun!