Qiological Community

How long should 1 filled ontake last?

I did an ontake bamboo mini treatment with legs and used up a full ontake. I was perhaps a bit slow as am still practising so it took me 20 minutes to do, palpating as I went.
I recall Oran you mentioned it would take 1 and half ontake to do a front and back treatment. Is that correct? If so, should I be packing the moxa tighter?