I hold the pole the same way as you have traditionally Simon.I have tried sitting on butt of pole with pole rest to the fore when you can hold the catapult handle with your right hand and feed more accurately, but have reverted to holding it as before. However, I picked up an "eezfeeda" at the Wychavon and am finding I can feed pellets and loose feed with it quite accurately with my left hand whilst holding the pole in my right
