Figures out how to take some measurements, although if the arms are radially bent, it will be off. Pressed one jaw of the caliper flat to the mount surface and measured to the other side of the seat tube.

1 0.19mm
2 0.00mm
3 0.04mm
4 0.20mm
5 0.24mm

So only about 0.24mm off at the crank. Not sure how that compares to normal, and if I should be bending the spider or the chainrings.