sit the rest of the year?
Probably.
But always nothing till the very last minute. Seems you're a good 5 years out from the last minute.
I'm still only around 60% sure of their predictability, but I had an old neighbor, a tree head, who would cut it to stumps every year.
I reckon you need both sides to keep it wholly alive, I'd keep the left (Dad)with 100 foliage, the middle with 80 (mom), and them 2 kids trying to run away at a 20, keep em small.
Make the family. I'd spend that 5 years building trunk thickness difference then hit it all the way to proper next segments.
Though you may need to utilize one kid as a sacrifice with 100 to keep that side of the base from getting overrun, (it is 2 trees right?) Then just go with one kid.
Sorce