Touch a nerve? Unlike you, I don’t try to make everyone think I know everything. I’m not familiar with that particular engine and without having one in front of me to actually look at and take measurements from it would be impossible to say exactly what I’d do but it wouldn’t involve the cheapest crap available that’s for sure. For starters, I’d look at the installation procedure used for the other 2 tensioners, given that sort of failure rate it’s likely something you did or overlooked caused them to fail. But no, clearly because you can turn a spanner you have also appointed yourself as an engineer and decided that it’s the parts fault clearly. Like I said, it’s your bike, fix it how you want, just turn it in with the high and mighty crap. If you are trying to troll it’s a seriously weak attempt- if your not, well, I’m not even sure what to make of that.