anyone use one or had probs? reason i ask as got one, well had one on my simtra after a ride today i pedaled mildly hard to get a run up at a bank and the bracket coming off the runner snapped, luckily i didnt get too hurt or whack my knackers on the frame etc as the chain came off and locked up,but im a bit dissapointed as there ment to be good yet slight power through the chain and it broke? i may make a new bracket but ive lost faith in it now, any recomendations to a tensioner that works in same way ie pushing chain down not up or can you alter the other ones to push down via the spring? anyone wana buy half a kingz bwahahaha , cheers guys