I used wedge brackets mounts and sliders, they told me they had to install a 20mm spacer to allow the sliding clearence. After install I was not completely happy due to the increased height.(no longer felt like I was in a sportscar, rather an SUV!). I was not satisfied and after much assessment and measurements I knew it didn't need to be this high, so I took it to a workshop and had the spacer removed and replaced with a 3mm spacer. So I gained 17mm back and I couldn't be more happier and find it the perfect height. I'm 5'9
A.is the Recaro seat base frame. B is the 20mm spacer.
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20mm.spacer removed and replaced with 3mm one.
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