Dont worry, I welcome all comments ! You mean the angle between the upper and lower links and where they intersect, right? That's a very good question and I forgot to explain.

I initially planned to have an angle (the distance between top and bottom joints on the chassis closer to each other than on the axle side) but on my first working model I immediately noticed this causes binding when rotating the axle (body roll). I never thought about it before this test, but after experiencing it I googled "four link binding" or something like that and realized it is normal with this design.

It makes sense when you think about it geometrically speaking though. The only way to achieve a freely moving axle with no binding was to make the links parallel. But I will still get somewhat of an anti squat or pro squat by playing with the ride height or chassis mounting location, if that makes any sense. I actually want the thing to plenty squat and roll for more realism haha

On 1:1 scale cars they use bushings in the links to allow compliance and prevent damage due to binding. Maybe thats what I should do lol