BioMax
+1y
I've been asked that question more than once...
The bars can only be considered as a straight line between the points. The bend only makes room for the bags and should be as minimal as possible. If your truck will make any kind of real horsepower, I would not suggest bending the bars. The only reason that we can get away with it on a mini is because there isn't any torque.
You are right about wanting the bars at 45 deg, but that isn't always possible. You want as much angle as you can fit in the confines and make sure the bushings are tight. If the bushings are worn or are sloppy, you will end up with excess side movement. Also, larger bushings would be a good idea, not necessary, but favorable.