Oh yes, a bit tricky. Especially since the front leg part almost always snaps, due to a thin connector between some sort of moulded-in actuator and the main leg. However, while looking through some old photos, I found one of a build of the previous Airfix Gnat (as a Red Arrow Gnat), which had what I could only describe as main UC based on not looking at a Gnat. The design had more in common with a Jet Provost.
