I'm a prep op and during this last meet, I did most of my routine really well but then on the last pass I totally messed up (compared to usual-usually the round-off bhs back tuck is no problem for me). I barely landed my back tuck because it was so low and I'm sure it had other problems. Yet I got a 9.0 because the rest of it was really good. I'm wondering what my score could have possibly been...so what is the deduction for lack of height?