In detail explaining thanks Stevey, and i agree with you on second hand parts, although the strut brace is the only scrap bit i used i took off all the arms and bearing of it and used my arms and replaced the bearing after noticing play on it, so with the new bearings in regards to audi c7 4g2 models torque it to 200nm plus 90° and leave it at that, no need to back the nut out quarter, is it silly if i went ahead and replaced the otherside bearing or would you leave it until humming noise becomes louder, i can barely hear the humming noise at 50km/h or at over 80km/h but it there very faint nothing concerning sometimes you think its the tyres grip but i do feel the grinding and when it comes to cars i like them to be top notch even slightest unusual noise would annoy me at first i thought it was the strut mounts thats how i ended up with broken pinch bolt but the mount were perfect it was the sway bar drop link that was knackered and making knuckles i have two spare strut mounts now