In 3-D the upper links are about 2.75in. apart from each other, and the lower links are about 1/2in. apart at the blue circles. These angles do affect the lengths of the links (for example it makes the lower links seem shorter and I had to account for this in the above pictures), but the angles have more to do with what happens as the axle articulates.
That 0.05in. in wheelbase change is very minimal, and I'm not worried about it for now. If I did want to correct it, however, it would require quite a bit of trial and error in working with the length of the links and their positioning on the chassis. The current suspension geometry took me about an hour to come up with, and that was with fixed upper and lower link lengths!
And BTW, this is more than an idea
. Thanks for the compliments.