I have just tried to adjust the seat belt but cant get it to move . I have tried every thing then remembered i think my 172 had a square knob just above the belt holder on the door pillar which you push in then slid it all up or down .
On the Trophys it is a fixed height due to the Recaros, nothing you can do unfortuanlty, well apart from getting a set of harnesses that you know you want. :lol: