This is a repaint for FSX of the venerable but still wonderful RealAir Siai-Marchetti SF260 as 'ST-31' of the Belgian Air Force aerobatic team Les Diables Rouges. It shows ST-31 a few years ago as the mount of team leader Commandant Yves Meelbergs.
The texture mapping on this old model is a bit wonky in places and it took ages to get the stripes and teeth anything like lined up - they're still not that good but life is short and there are many more things to paint.
The main thing is that 13 years after its release for FSX, and even longer since it first flew in FS9, RealAir's SF260 is still a complete blast to fly.