I have changed these myself before and got 3 years out of similar ones off ebay.
Seller has said he will refund on return/inspection but no compensation for time/hassle/tyres ruined as the warranty only applies to professional mechanics
Plus I will probably destroy any 'evidence' when I remove the bushes
I have a video of the slackness in situ but AVI is not recognised when I tried to load on here. Got iphone video mp4 but again not recognised mp4 file.