Sassenach
Actually, in a 200kt plane the wind drift matters a lot less than in a 100kt plane
I think you meant it the other way round, 200kt wind?
Also very few people here, never mind general PPLs, are flying at 200kt. Only very few piston planes can do a genuine 200kt, and most of those are turbo and need to be at FL200+ to get the TAS gain.
If you can fly a heading to 1 degree ACCURACY, you are a) a robot and b) flying a PC sim. Not even an autopilot can fly a heading to 1 degree STABILITY except in dead still air.
As for accuracy, a slaved HSI doesn't read that accurately, and even the most perfectly calibrated liquid compass cannot be read that accurately.
The only way to do 1 degree is to fly along a GPS track.
You must be pulling my leg.