Volvo C70 2.5T Coupè 1998 Suspension Comfort Problem

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Hello. After having replaced all the spare parts listed in this topic and also of the others, the comfort is still not enough. I even had 4 new KYB springs installed. I think the problems are 2:
1 - the new Sachs shock absorbers are not exceptional (exactly like the original Volvo Sachs ones too, which perhaps were not great since new ones in 1998), which I will therefore replace with Bilstein B6 shock absorbers (I heard that in addition to improving handling and stability (of which I am not currently complaining) they also improve comfort (they are double pipe))
2 - I have the 4 dashboard hooks split (typical defect of the S70 V70 C70), therefore I will have to disassemble the dashboard and repair the problem. In fact, it makes annoying noises. Having solved these problems, I believe the comfort will finally be at excellent levels.