Does the practice of the Companions strengthen a mursal hadith, as some scholars assert?

The questioner : Regarding this, we return to the three opinions on the ruling concerning acting upon a mursal hadith. When they say, for example, that if it is supported by the practice of the scholars or agrees with the practice of the Companions, does this agreement mean that it can strengthen and support the mursal hadith?

The Shaykh : ... it strengthens the ruling, not the hadith. But that is not what they intend; rather, they intend the hadith. We need to distinguish between these two ... .