I "took a break from" (not) figuring out h>3 and looked into using Kepler, rather than Newton, in finding time-of-flight - Newton was a time-waster and (at float-point δT) increasingly inaccurate as T rises. I also strongly suspected that we actually need eccentricity in getting to the next planet over. And that Earth/Mars wouldn't need those Pork Chop Plots which admittedly we do need for Earth/Venus, and for the Belt.
After banging at this, last weekend - I think I'm done. Here is "On reaching an eccentric orbit by a ballistic route". In the process this un-messes Mars; so, if you've read Russell-Ocampo 2004, use this chart instead.
One nice knock-on effect is that if you time your departure right, you can hit your desired point in Mars' orbit, and shave off V∞ or time-of-flight. Probably not both unfortunately. And the s[h]avings are light enough that it might be Pork Chop Night anyway.
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