I can see 6 of 11 currently on connect.

Channellocks or a strap wrench might serve better.

With the dislaimer that I know nothing about trees in France…Here is some info on what grows there. Of what I see on a quick skim, I’d probably be looking to see if hornbeam or beech has the right kind of bark. It looks kind Alder related to me, but that may not be a useful starting point.

I’ve been watching some of those episodes again since they are on youtube now. I grew up watching them with dad and hope to do the same with my son.