I just use a tall walking stick to shoot off of. I will take a wide stance for stability. Then hold the stick at a point that will allow me to shoot at the height I need too. I lay the contender across my wrist. I can either lean my body or the stick to adjust my shot. That has always worked for me. My avatar actually show the stick I use.
"The democracy will cease to exist when you take away from those Who are willing to work and give to those who would not."