Vaessen Motorsports Sequential Shifter

This is the Vaessen Motorsports sequential shifter, I have designed this to be a solid shifter with a mechanical feel. It also involves off the shelf parts to make assembly easy. You will need a basic set of tools and a soldering iron. I would recommend printing at 100% infill to keep this nice and strong.

Parts needed:
M8 x 50 studding (shorturl.at/fBOU2)
1 x m6 x 18 countersunk bolt (shorturl.at/EHJO9)
6 x m6 x 40 cap head bolts (shorturl.at/vwG78)
6 x m6 nyloc nuts (shorturl.at/bnwAT)
1 x m6 nut (shorturl.at/rABSX)*
1 x m6 x 20 stud connector (round) (shorturl.at/CNQ26)
2 x m6 x 10 cap head bolts (shorturl.at/vwG78)
1 x m6 x 60 cap head bolt (shorturl.at/vwG78)
4 x m6 countersunk bolts for mounting (shorturl.at/tJOP3)
1 x m6 female rod end (shorturl.at/citQ8)
1 x 18mm OD x 2mm section x 30mm long compression spring (Flexosprings code 243510/243610 depending on how strong you want it to be)
4 x m10 nuts (shorturl.at/rABSX)
2 x m10 x 20 ball plunger grub screws (shortu