I should have searched yesterday before ordering my bow and arrow set. I just came cross this much more elegant, and possibly cheaper, solution.
I think my Fimi would be a prime candidate for one of these things and I’m wondering if I should put one together without waiting for my bow and arrows to arrive. The concept of firing a projectile into the tree is obviously the correct one but the idea contained in this video looks to be a much more effective way of going about it. And the ‘projectiles’ used would be cheaper too.