Philthy
You are not a fan of 'monitoring ctaf'.
Perhaps there is a better way to convey the message.
The ambiguity lies with how many vhf comms are functioning. If the pilot has access to only one vhf comm then when he says changing to ctaf ATC no longer has comms. Straight forward. Alternatively with two vhf comms the pilot has access to both comms continuously. So if ATC asks the frquency changing question is there a more succinct way to deliver the message.
My point is does ATC know how many vhf comms you have operating or is it an assumption it must be two.