Main point is to avoid moving the aircraft on the ground until the gyros have fully run down…
Thanks for the link, never thought about it.
I just read up on gyro precession and realized why precession is worst after 180° turns (in a 360 the force is cancelled out by the second 180). That explains why I had so much precession on my last flight where I did a couple holds (just VFR for fun) and precession was worse than in normal flight.
CASA is helpful for once… 
