Glad it worked for you. Boxwood back budding only happens to mine when there are latent buds there to begin with.
I have collected BW that have only couple of leaves at the ends that grow like weeds shortly after. I recently learned that they can be veneer grafted easily so I am doing that on lots of mine now...no need waiting to chase branches back now.
BTW, BW also seem to hold on to stub chopped branches for a long time. I have several veneer and cleft graft going on year old stubs and looks like they will take!