I'm having little trouble following what you actually have and what you're actually installing, but, I cannot imagine how one could possibly even measure fork-crown length whithin 2mm, let alone feel any change in the ride or handling caused by that alone. It's about 1/16".

The difference between a 43mm rake and a 42, again, so tiny. Even 43-45 could be noticable, maybe not. If noticable - could be positive, could be negative, but I really doubt if either is meaningful to anyone except very sensitive rider. You'll probably feel the difference in handlebar height, and that will be a huge amount greater a change than the fork geometry so as to make it (the geometry) unnoticable.