Therefore, switching from a hybrid shuttle to a classic shuttle feels off, for instance I have to adjust my clears or the classic feather shuttle lands short if I use as much power as I do with the KK500. The flight of the KK500 is straighter by the time it reaches the deep end of the opponents court while good feather shuttles have more of a 'parachute effect' at the end of their trajectory I would say. I recently started to feel the difference between these hybrids and higher end feather shuttles. I plan to do more tournaments and those shuffles are not allowed (in France at least) for competitive games.
After a year and a half using those shuttles I decided to switch to full feather ones, even for drills.