Once I got all my ratings I did a bunch of proficiency time in the simulators with another CFII running the sim...there was no entries made in anybodys logbook, nor was there a need to.
Really? What does the regulation say?
§ 61.189 Flight instructor records.
(a) A flight instructor must sign the logbook of each person to whom that instructor has given flight training or ground training.
How about that?
No need to make any entry, other than that required under the regulation, right?