I just read up on the Origen part of the discussion and being an Origen lover myself I thought I'd chime in.
What I am noting on almost all posted pictures is quite long negative legs.
If you take off the top nut and loosen the lower one, you can turn your positive post so the holes angle slightly towards the side you will be fixing your negative lead on. When setting up a brand new Origen, I usually also use a pair of needle nose pliers to give the deck a slight nudge to make sure it sits snug.
Second, I like to wrap my negative around the screw from behind, makes it very easy to hold for me and the rotation of the screw puts tension on the wire instead of working against it. (assuming a build on the right hand side of the deck ofc)
The outcome is pretty much equal leg length on both positive and negative sides.
As far as flavor goes, 2nd biggest airhole still has amazing flavor for me. I find that, at least with my builds (8wrap 26gauge kanthal microcoil on 2.5mm, or 6 wrap 26 gauge titanium spaced on 2.5mm) the flavor drops considerably on the largest airhole. I typically vape between 34-42watts (dual
coils).