Hi Grower,

I had written a long reply some moments back...darn thing got deleted

Anyway the gist was that i have very limited experience of seeing this prototype in action or even coming across a person from this profession of tree climbing hence i cannot coment much on this issue. But i can encourage you to try it out yourself for a week and see how you go with it. If its comfortable for you to use you can encourage others to use it for a week and thus have a small experimental trial yourself.
At least thats what i would have done if i was in your place
No harm in giving it a shot. Your wife can always guide you being a sports physio herself.

cheers mate
Anish