So I am able to fit in my m3 with manual vaders right now with everything lowered all the way down and a slight recline in my seat. I'd ideally like to sit a bit more upright. I'm also looking into the Autopower bar so I can put harnesses in the car. Which would prevent me from slouching a bit like i do now to get more headroom.

I searched around here and some people sugjested this idea but i didnt find anyone that found a way to do it. Any ideas out there?