“The Buddha also said to Kasyapa: "Noble Son! It is not appropriate to term suffering as the Noble Truth [of suffering]. Why is that? If one were to term suffering 'the Noble Truth of Suffering', then cattle, sheep, donkeys, horses and the denizens of hell would also have the Noble Truth [of Suffering]. Noble Son! Whoever thinks that the extremely profound [gambhira] domain/ sphere/ realm [visaya] of the Tathagata - the eternal, untransforming Dharmakaya [Body of Truth] - is a body nourished by food, such a person does not know of the virtues and power which the Tathagata possesses. This [i.e. such ignorance of the true nature of the Buddha] is 'suffering'. Why so? Due to ignorance. A person views Dharma as non-Dharma, and non-Dharma as Dharma. Know that this person will fall into the unfortunate realms and repeat birth and death. This will increase the bonds of illusion and worry will grow. If he comes to know that the Tathagata is Eternal, one with whom there comes about no change, or if he hears the word "eternal", he will obtain birth in heaven. And on gaining emancipation, he will actually see that the Tathagata is Eternal and Unchanging. When this is well seen, he will say: "I heard about this in the past. Now that I am emancipated, I know this. As I was ignorant regarding the Ultimate, I have been repeating birth and death to no end. Today, I am enlightened as regards true knowledge." If knowledge reaches this stage, this is truly practising suffering. There is much to profit from. One may well practise this, but if one does not know things to be thus, no profit will result. This is what is called knowing suffering. This is the noble truth of suffering. If one does not practise thus, this is suffering and not the noble truth of suffering.
So it seem it is wrong to practice noting sensations and tag them no-self, suffering, impermanence.