Or, here's a question; the DC jack is panel mount, so I wasn't worried about where the voltage regulator was in relation to the DC jack, as the wires are just free-air anyway, so where it attaches to the board could be anywhere.
Could I do the same to get from the linear regulator to the high-current-draw daughterboard connector; that is, a free-air wire of some gauge? Is there a convention for this sort of thing? Is it a no-no, or am I in the exact same situation with the 85mil trace? Everything else other than the daughterboard connector could be done on the PCB of course; we're just talking a few mA for ATtiny and some 74HCT.