thats a warp feed isnt it??i dont see this problem being fixed without some kind of home built backpack loading system. seen a few about. a tourny team were using em a couple of years back. storm something or other. their hoppers were next to the air bottle and a pipe fed the balls thru. dunno how that would work tho.
maybe ur mate needs to practice some rather then lookin for a quick fix. my eye sight is buggered. i can barely see thru my left eye but it hasnt stopped me playin. just makes shooting with my left hand more difficult when looking down the side of a bunker