Your story about fiberglass is rough, like the skin and air problems. It's scary how many homes use things that can make people sick. Wool is a good choice because it's natural and deals with dampness better. I wonder if you'll pay less for heat or if it holds up for years. Did you check out other natural things like shredded paper or cork before wool? What was the toughest part when you installed it yourself?

That point about pruning to "prevents surprises" is so true. I found it also stops other issues you don't expect, like pests hiding in the thick leaves. Giving the plants some space lets air move through and cuts down on mold, too. A quick check when you're trimming lets you spot any problems early.

Charge extra for mid-job changes next time.

Actually, @the_kelly, it can sting when family doesn't take your art seriously, even as a joke.

Real learning happens in person.