Got all the cubs out for a tinkerin' session. I double-checked the charging system on the puller. Turns out carbon on the relay in the regulator kept it from charging properly. a little file work and adjustment and it's up to snuff again.
Got the 70 charging again (had the S/G rebuilt) and tinkered with the relay ground. Other tractors are pretty solid right now, so it was just time to line 'em up for a quick family photo.