I realize that two nodes are enough but I usualy go with three or more if posible. The lowest node will surely dissappoint you. A snip from a seedling is one of the most difficult chore a grower has to do. Once perfected it can be done in ones sleep. After I cut my cubes for cloning I stick a 3.25" framing spike(nail) to make the hole in the rockwool for the clone. I leave this spike in the cubes while soaking and I find it handy because if you're paying attention the instructions say this side up. When placing the snip in the cube make the hole in the rockwool larger with the nail so the stem of the clone can easily be placed into the hole. after the clone is in give the rockwool a slight sqeeze and it's off to the bin etc. I feel sorry for some of the people on this site. They still haven't figured what the nail is for or how to use it or even why you need to make a hole in the rockwool cube for the clone in the first place. I use a #2 powder root stimulator as directed on the product. I do not top my clones when I put them in bud because I got a mom(s) for them already, I only do the seedlings.