Ed thats completely understandable, i wish there were more like you, your critersisms are much appreciated.

first of all vortex is a bloody powerfull vertical spinner so its bound to send things upwards . we havent ever run a vertical spinner. i think the piont sam was saying (correct me if im wrong please ) is that the roof was very low anyway??? the gap between the top of the polycarb and the roof is quite minimal, so anything going upwards would of had a hard time getting out. still not impossible though therefore we didnt run vertical spinners

unless we do get a roof sorted or ajust the venues roof we still wont be running vertical spinners