springboard

From reading previous posts, it appears the number of springs used in a springboard is based on several factors. My daughter is an L9, about 85 lbs. She has been using 6 springs since L7 til L9 to do her yurchenko at her previous gym. Her new gym uses 4 springs for everyone and that is now...

How many springs would you keep in for a very light (65lb) yurchenko vaulter? Do you adjust remove or add springs according to the gymnast's weight or power or both? Are there other factors involved???