As most of us know, fimming allows the two growth tips directly below the main top growth tip to catch up to the main top while also destroying the dominance of the main cola, this way you end up with three main growth tips , each smaller than if you left one main, but still very worth doing. I can't tell if you cut it right but as long as you didn't cut to low and accidentally top the plant, then you can always take a little more off the top, you should end up with THREE tops, the original main, and the two growth tips directly below the original main, should all be of equal size and will all be "mains"