Hi @pinewood.
I personally would not do ketones until my meter started flashing hysterically (which I think is anything above 13mmol/l) or unless I was unwell or weeing a lot etc.
Basically, I haven't felt the need to do it since I first brought my BG numbers down after diagnosis.
Thanks @urbanracer. I unexpectedly dipped into double figures this morning for the first time in a long while and I wasn't sure if I should have done a Ketone check even though I felt fine. It dropped back down pretty quickly in any event.