The Jetco Sabre Stunt hit the market around 1960, so it's clearly Classic, Nostalgia, and Modern-legal. I built one of the first-generation kits, also my first full body stunter.
The kit was an easy build, compared to other full body stunters. Unfortunately, the wing is a bit small and thin compared to the competition. I built mine with the usual Fox 35 Stunt.
If I was to do it again, I'd use an OS 25 FS or FX and build really light.