Ok, basically i have obtained a Trichocereus pasacana that is around 6 or 7cm in diameter and was thinking of grafting it to my san pedro which is around two feet tall. (sorry of thats a bit of a mixture of measurements) i was basically wondering how easy it would be to do? would it literally be the same as grafting a peyote to a san pedro? any help would be great, thanks very much.