RE: Seagull Edge 540 78
The elevator and horizontal stabiliser is fitted in 2 pieces. There is an aluminium tube that runs right through the fuselage and the stabiliser is prevented from swivelling about the tube by the stabiliser fitting into a shallow cut-out in the fuselage. Each stabiliser half is screwed to the fuselage by 4 wood screws/ self-tappers. I would recommend having a very long No 1 posidrive in your toolkit because the screws are very close to the stabiliser and the screwdriver handle can mark the surface.
In principle, you could take the horizontal stab off each time you transport it, but I decided that the screws would loosen over time if I did. So, I leave the stab permanently attached. I drive a Toyota Yaris Mk 1, ie a small car, and the plane still fits with the front seat lowered. I get friendly with the prop while I'm driving, mind you.
Hope this helps.
Carole