Many years ago two military students of mine were briefed on how to swap seats at the half way point of a first night mutual at a relatively busy joint-user airfield during the business hour rush:
collective lock on,
throttle flight idle,
cyclic friction on,
force trim on,
right hand seat occupied last then first.
All understood?
Yessir, do we do this on the Duty Runway?
GAGS
E86
PS with students don't leave any stone unturned!