Not available for sale to USA so keep using ya ascenders.
Psssst, to use you ascenders the rope still has to be secured to the top of the tree first.
Have you seen video of how easy it is and how the McMahons fire a bag 200' plus into the canopy of some huge gum?
They have 2 big shots mounted together, crank it up with a prussik release mechanism, aim and fire. They use a roll of bailing twine so if the shot sucks just cut it off and go again.
Check out the video on this link
Bond Treeclimbing Stunt