sorry if this tread maybe wrong at this place, but don´t know how else.
I have made a german Forum for Treeworkers like your´s. It´s been online since yesterday and i have no treads maybe you have a look. eventually some guy´s of you can speak or write german ?
my name there is "Klettermaxe" if a translate it means "climbingmaxe"
Maxe is a shortform aof a name.
maybe cu in the german forum